- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
底部的程序应该返回目标缺失的子句,在这种情况下 p(1, 3, fire)
是可证明的。
问题是它返回一个“太多”的解决方案,如输出中的最后一个解决方案所示:
?- main.
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,2,johnDroppedAMatch)
true ;
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,1,johnWasTired)
true ;
MISSING PREMISES:
precedes(3,3)
p(A,3,presenceOfFlammableMaterial)
p(B,2,johnWasTired)
true ;
false.
我想要的只是:
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,2,johnDroppedAMatch)
true ;
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,1,johnWasTired)
true ;
我很难理解哪里出了问题,希望能得到一些改进的提示 :-),或者一些文献提示(我已经熟悉 Markus Triska 的优秀页面)。
重要的谓词是missing0(G, M)
,其中G
是目标,M
是缺失子句的列表。我对这个问题的怀疑之一是可能有无数个失败的子句,所以我错过了某种“停止”条件。
我发布了相同的 question在 SWI Prolog 论坛上,但没有得到任何回应。我正在运行 SWI Prolog。
% https://www.swi-prolog.org/pldoc/doc/_SWI_/library/clp/clpr.pl
:-use_module(library(clpr)).
% time is ordered
precedes(1, 2).
precedes(2, 3).
% knowledge
p(X1, T2, johnDroppedAMatch):-
p(X2, T1, johnWasTired),
precedes(T1, T2),
{X1 = 0.5 * X2}.
p(X1, T2, fire):-
p(X2, T1, presenceOfFlammableMaterial),
p(X3, T1, johnDroppedAMatch),
precedes(T1, T2),
{X1 = 0.7 * X2 * X3}.
% --- Reasoning about knowledge
missing(G, M) :- call(G),
M = ['There are no missing premises.'].
missing(G, M) :- \+clause(G, _),
M = ['There are no clauses for the goal.'].
missing(G, M) :- clause(G, B), \+G, missing0(B, M).
% -- Look for missing clauses in a conjunction
missing0(G, M) :- G = (G1, G2), !,
missing0(G1, M1), missing0(G2, M2), append(M1, M2, M).
% -- Look for missing clauses in a disjunction
missing0(G, M) :- G = (G1; _), missing0(G1, M).
% -- Look for missing clauses in a disjunction
missing0(G, M) :- G = (_; G2), missing0(G2, M).
% -- If G is callable then it is not missing
missing0(G, M) :- call(G), M = [].
% G fails, and is neither a conjunction nor a disjunction, so
% put in in M. Here I collect missing clauses.
missing0(G, M) :- \+G, G \= (_, _), G \= (_; _), M = [G].
% If G fails and if B is in the body of G, check what predicates are
% missing for B to be provable. G \= {_} is to avoid an error when
% using clause/2 on clpr predicates.
missing0(G, M) :- \+G, G \= {_}, clause(G, B), missing0(B, M).
showMissing(M) :- copy_term_nat(M, M1),
numbervars(M1, 0, _, [attvar(bind)]),
sort(M1, M2),
nl, writeln('MISSING PREMISES:'),
maplist(writeln, M2).
main :- missing(p(1, 3, fire), M), showMissing(M).
最佳答案
不是答案,但我对代码进行了一些尝试,添加了一些打印输出并使其具有确定性。它现在报告一个解决方案。
这是原始代码,带有一些打印输出。它的报告与以前完全一样,输出没有排序,以便能够跟踪它首先命中的内容。
:-use_module(library(clpr)).
% ======================
% knowledge
% ======================
% time is ordered
% Note: Time is not transitive as precedes(1,3) is missing!
precedes(1, 2).
precedes(2, 3).
p(X1, T2, johnDroppedAMatch):-
p(X2, T1, johnWasTired),
precedes(T1, T2),
{X1 = 0.5 * X2}.
p(X1, T2, fire):-
p(X2, T1, presenceOfFlammableMaterial),
p(X3, T1, johnDroppedAMatch),
precedes(T1, T2),
{X1 = 0.7 * X2 * X3}.
% ======================
% reasoning about knowledge
% ======================
% Note: What exactly does it mean for a premise to be "missing"?
% Are variables to be resolved when reporting?
missing(G, M) :- call(G),
M = ['There are no missing premises.'].
missing(G, M) :- \+clause(G, _),
M = ['There are no clauses for the goal.'].
missing(G, M) :- clause(G, B), \+G, missingr(B, M, 0).
% --- Recursively look for missing stuff in a goal
% D is the Depth of the analysis
% SP is a string of spaces for indentation
missingr(G, M, D) :- G = (G1, G2), !,
sp(D,SP), format("~w«~w» AND «~w»\n",[SP,G1,G2]), spinc(D,DP),
missingr(G1, M1, DP),
missingr(G2, M2, DP),
append(M1, M2, M).
missingr(G, M, D) :- G = (G1; _), !,
sp(D,SP), format("~w«~w» OR «~w»\n",[SP,G1,"..."]), spinc(D,DP),
missingr(G1, M, DP).
missingr(G, M, D) :- G = (_ ; G2), !,
sp(D,SP), format("~w«~w» OR «~w»\n",[SP,"...",G2]), spinc(D,DP),
missingr(G2, M, DP).
missingr(G, M, D) :- sp(D,SP), format("~wMaybe «~w» can be called?\n",[SP,G]),
call(G),
format("~w«~w» succeeds; nothing is missing here.\n",[SP,G]),
M = [].
missingr(G, M, D) :- \+G, G \= (_,_), G \= (_;_),
sp(D,SP), format("~w«~w» is not provable, not a conjunction, not a disjunction: Consider missing!\n",[SP,G]),
M = [G].
missingr(G, M, D) :- \+G, G \= {_}, clause(G, B),
sp(D,SP), format("~w«~w» is not provable, not a constraint, and a clause with body «~w», continue with body\n",[SP,G,B]), spinc(D,DP),
missingr(B, M, DP).
% Igniter
showMissing(M) :- copy_term_nat(M, M1),
numbervars(M1, 0, _, [attvar(bind)]),
% sort(M1, M2), % do not sort so that terms are output in found order
M2 = M1,
nl, writeln('MISSING PREMISES:'),
maplist(writeln, M2).
main :- missing(p(1, 3, fire), M), showMissing(M).
% Generate string of N spaces fast.
spinc(In,Out) :- Out is In+2.
sp(0,"") :- !.
sp(1,".") :- !.
sp(Len,Str) :- Len > 1,
Lenx is Len div 2, Remx is Len rem 2,
sp(Lenx,Strx),
string_concat(Strx,Strx,Stry),
(Remx == 0 -> Str = Stry ; string_concat(Stry,".",Str)),!.
?- main.
«p(_7002,_7004,presenceOfFlammableMaterial)» AND «p(_7010,_7004,johnDroppedAMatch),precedes(_7004,3),{1=0.7*_7002*_7010}»
..Maybe «p(_7002,_7004,presenceOfFlammableMaterial)» can be called?
..«p(_7002,_7004,presenceOfFlammableMaterial)» is not provable, not a conjunction, not a disjunction: Consider missing!
..«p(_7010,_7004,johnDroppedAMatch)» AND «precedes(_7004,3),{1=0.7*_7002*_7010}»
....Maybe «p(_7010,_7004,johnDroppedAMatch)» can be called?
....«p(_7010,_7004,johnDroppedAMatch)» is not provable, not a conjunction, not a disjunction: Consider missing!
....«precedes(_7004,3)» AND «{1=0.7*_7002*_7010}»
......Maybe «precedes(_7004,3)» can be called?
......«precedes(2,3)» succeeds; nothing is missing here.
......Maybe «{1=0.7*_7002*_7010}» can be called?
......«{1=0.7*_7914*_7940}» succeeds; nothing is missing here.
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,2,johnDroppedAMatch)
true ;
....«p(_7010,_7004,johnDroppedAMatch)» is not provable, not a constraint, and a clause with body «p(_7278,_7280,johnWasTired),precedes(_7280,_7004),{_7010=0.5*_7278}», continue with body
......«p(_7278,_7280,johnWasTired)» AND «precedes(_7280,_7004),{_7010=0.5*_7278}»
........Maybe «p(_7278,_7280,johnWasTired)» can be called?
........«p(_7278,_7280,johnWasTired)» is not provable, not a conjunction, not a disjunction: Consider missing!
........«precedes(_7280,_7004)» AND «{_7010=0.5*_7278}»
..........Maybe «precedes(_7280,_7004)» can be called?
..........«precedes(1,2)» succeeds; nothing is missing here.
..........Maybe «{_7010=0.5*_7278}» can be called?
..........«{_8266=0.5*_8368}» succeeds; nothing is missing here.
....«precedes(2,3)» AND «{1=0.7*_7002*_8266}»
......Maybe «precedes(2,3)» can be called?
......«precedes(2,3)» succeeds; nothing is missing here.
......Maybe «{1=0.7*_7002*_8266}» can be called?
......«{1=0.7*_9472*_8266}» succeeds; nothing is missing here.
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,1,johnWasTired)
true ;
..........«precedes(2,3)» succeeds; nothing is missing here.
..........Maybe «{_7010=0.5*_7278}» can be called?
..........«{_8266=0.5*_8368}» succeeds; nothing is missing here.
....«precedes(3,3)» AND «{1=0.7*_7002*_8266}»
......Maybe «precedes(3,3)» can be called?
......«precedes(3,3)» is not provable, not a conjunction, not a disjunction: Consider missing!
......Maybe «{1=0.7*_7002*_8266}» can be called?
......«{1=0.7*_9476*_8266}» succeeds; nothing is missing here.
MISSING PREMISES:
p(A,3,presenceOfFlammableMaterial)
p(B,2,johnWasTired)
precedes(3,3)
true ;
false.
考虑到这一点,就不清楚“缺少谓词” 是什么意思,甚至不清楚在解释过程中遇到合取或析取时应该发生什么。需要更多细节!
这里是修改后的代码,它似乎符合要求,但更具确定性,只输出一个解决方案:
:-use_module(library(clpr)).
% ======================
% knowledge
% ======================
% time is ordered
% Note: Time is not transitive as precedes(1,3) is missing!
precedes(1, 2).
precedes(2, 3).
p(X1, T2, johnDroppedAMatch):-
p(X2, T1, johnWasTired),
precedes(T1, T2),
{X1 = 0.5 * X2}.
p(X1, T2, fire):-
p(X2, T1, presenceOfFlammableMaterial),
p(X3, T1, johnDroppedAMatch),
precedes(T1, T2),
{X1 = 0.7 * X2 * X3}.
% ======================
% reasoning about knowledge
% ======================
% Note: What exactly does it mean for a premise to be "missing"?
% Are variables to be resolved when reporting?
missing(G, M) :- call(G),
M = ['There are no missing premises.'].
missing(G, M) :- \+clause(G, _),
M = ['There are no clauses for the goal.'].
missing(G, M) :- clause(G, B), \+G, missingr(B, M, 0).
% --- Recursively look for missing stuff in a goal
% Conjunction
% In a conjunction we can fail on left or right, go down both branches.
missingr(G, M, D) :- G = (G1, G2), !,
sp(D,SP), format("~w«~w» AND «~w»\n",[SP,G1,G2]), spinc(D,DP),
missingr(G1, M1, DP),
missingr(G2, M2, DP),
append(M1, M2, M).
% Disjunction. Finagle a proper guard!
% Note: In a disjunction we fail if we fail on both sides, but then what to report???
missingr(G, M, D) :- G = (G1; G2), !,
sp(D,SP), format("~w«~w» OR «~w»\n",[SP,G1,G2]), spinc(D,DP),
(missingr(G1, M, DP) ; missingr(G2, M, DP)).
% If G is callable and succeeds then it is not missing.
% The call will unify variables, which may or may not be what we want.
missingr(G, M, D) :- sp(D,SP), format("~wMaybe «~w» can be called?\n",[SP,G]),
call(G), !,
format("~w«~w» succeeds; nothing is missing here.\n",[SP,G]),
M = [].
% If G fails and if B is the body of G, check what predicates are
% missing for B to be provable. G \= {_} is to avoid an error when
% using clause/2 on clpr predicates.
missingr(G, M, D) :- \+G, !,
sp(D,SP), format("~w«~w» is nonprovable\n",[SP,G]), spinc(D,DP),
nonprovable(G, M, DP).
nonprovable(G, M, D) :- G \= {_}, clause(G, B), !,
sp(D,SP), format("~w«~w» is a nonprovable clause with body «~w», continue with body\n",[SP,G,B]), spinc(D,DP),
missingr(B, M, DP).
nonprovable(G, M, D) :- G \= {_}, !,
sp(D,SP), format("~w«~w» is a nonprovable non-clause: considered missing!\n",[SP,G]),
M = [G].
nonprovable(G, M, D) :- sp(D,SP), format("~w«~w» is a constraint; dropped!\n",[SP,G]),
M = [].
% Igniter
showMissing(M) :- copy_term_nat(M, M1),
numbervars(M1, 0, _, [attvar(bind)]),
nl, writeln('MISSING PREMISES:'),
maplist(writeln, M1).
main :- missing(p(1, 3, fire), M), showMissing(M).
% Generate string of N spaces fast.
spinc(In,Out) :- Out is In+2.
sp(0,"") :- !.
sp(1,".") :- !.
sp(Len,Str) :- Len > 1,
Lenx is Len div 2, Remx is Len rem 2,
sp(Lenx,Strx),
string_concat(Strx,Strx,Stry),
(Remx == 0 -> Str = Stry ; string_concat(Stry,".",Str)),!.
运行它会生成一个解决方案:
?- main.
«p(_5182,_5184,presenceOfFlammableMaterial)» AND «p(_5190,_5184,johnDroppedAMatch),precedes(_5184,3),{1=0.7*_5182*_5190}»
..Maybe «p(_5182,_5184,presenceOfFlammableMaterial)» can be called?
..«p(_5182,_5184,presenceOfFlammableMaterial)» is nonprovable
....«p(_5182,_5184,presenceOfFlammableMaterial)» is a nonprovable non-clause: considered missing!
..«p(_5190,_5184,johnDroppedAMatch)» AND «precedes(_5184,3),{1=0.7*_5182*_5190}»
....Maybe «p(_5190,_5184,johnDroppedAMatch)» can be called?
....«p(_5190,_5184,johnDroppedAMatch)» is nonprovable
......«p(_5190,_5184,johnDroppedAMatch)» is a nonprovable clause with body «p(_5572,_5574,johnWasTired),precedes(_5574,_5184),{_5190=0.5*_5572}»,
........«p(_5572,_5574,johnWasTired)» AND «precedes(_5574,_5184),{_5190=0.5*_5572}»
..........Maybe «p(_5572,_5574,johnWasTired)» can be called?
..........«p(_5572,_5574,johnWasTired)» is nonprovable
............«p(_5572,_5574,johnWasTired)» is a nonprovable non-clause: considered missing!
..........«precedes(_5574,_5184)» AND «{_5190=0.5*_5572}»
............Maybe «precedes(_5574,_5184)» can be called?
............«precedes(1,2)» succeeds; nothing is missing here.
............Maybe «{_5190=0.5*_5572}» can be called?
............«{_6626=0.5*_6728}» succeeds; nothing is missing here.
....«precedes(2,3)» AND «{1=0.7*_5182*_6626}»
......Maybe «precedes(2,3)» can be called?
......«precedes(2,3)» succeeds; nothing is missing here.
......Maybe «{1=0.7*_5182*_6626}» can be called?
......«{1=0.7*_7658*_6626}» succeeds; nothing is missing here.
MISSING PREMISES:
p(A,2,presenceOfFlammableMaterial)
p(B,1,johnWasTired)
true.
但如前所述,我们真正想要的是什么?
关于prolog - 用于查找可证明目标缺少哪些谓词的程序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59520621/
我创建了一个基于命令行可移植脚本的工业化不可知构建系统,可用于快速构建多个依赖项目,而不必依赖特定的 IDE 或构建工厂。它是不可知的,因为它不是基于单个构建引擎。我使用 cmake 创建了第一个版本
我最初使用 Java 目标开发了一个语法(用于 TestRig 支持),然后将其移植到 Python(从 git hub 语法存储库扩展了 Python3 语法,因此需要将操作移植到 Python
我有一个以 iPhone 和 watchOS 为目标的 Xcode 项目。 iPhone 目标使用加速度计,模拟器不支持。我可以只启动 iPhone 应用程序而不启动 watch 目标吗?我从: Ca
您好,我想创建一个批处理文件,用于在 .eml 文件(目标 A)中查找某些关键字,然后删除它们所在的行。之后,我需要批处理文件将"new"文件放入(目标 B)中的单独 .eml 文件中。文件也可以是
当尝试通过 IntelliJ 运行示例 CorDapp (GitHub CorDapp) 时,我收到以下错误: Cannot inline bytecode built with JVM target
我在尝试向我的 kotlin spring 项目添加一些依赖项时遇到问题。我使用 spring boot 初始化程序来运行一个基本项目。 我的问题:如果我取消对 jackson 或 Koin 依赖项的
这是有问题的网站: http://www.onepixelroom.com/londonrefurb 当我点击关于部分后面的多个圆圈时,我希望它更改上面文本中的引号。 到目前为止,我得到它来显示 文本
单击后,我将删除两个元素 $(this) 和 $("#foo")。 目前我的代码如下所示: $(this).remove(); $("#foo").remove(); 如何在不重复自己的情况下优化它?
我有一个小脚本,可将 Markdown 文件编译为 html,并将其与一些样式表和 javascript 一起插入到模板的主体中。我有一个 GNU makefile 来完成这个: output.htm
已关闭。此问题需要 debugging details 。目前不接受答案。 编辑问题以包含 desired behavior, a specific problem or error, and the
一些背景知识: 在android中我们开发了同样的应用,基本上我们先开发了Android应用,现在我们创建了它的IOS版本,所以这个应用有多个客户端。在 android 中,我们实际上是使用 Andr
我想知道是否可以使用 knockout 来更改html中的目标() 我的所有其他信息都在 JavaScript 中,所以这对我来说是一个大问题。这是我的 JavaScript: var library
这个问题在这里已经有了答案: Selecting and manipulating CSS pseudo-elements such as ::before and ::after using j
我在我的有向图中添加了一堆节点和顶点,使用设置 typedef boost::adjacency_list graph; 创建 Node有一个节点名称字符串,Edge它的分数有一个整数。我试图遍历所有
关闭。这个问题不符合Stack Overflow guidelines .它目前不接受答案。 这个问题似乎与 help center 中定义的范围内的编程无关。 . 关闭 8 年前。 Improve
如何存储我在 NSUserDefaults 中创建的 Goal 类型的对象数组? ( swift ) 代码如下: func saveGoalList ( newGoalList : [Goal] ){
Array.prototype.indexOf 和 Date.now 已在 ES5 中引入。如果我编译存储在文件 test.ts 中的以下代码,为什么 Typescript 不能转译? Date.no
我正在阅读有关属性的内容,并了解到可以使用您的代码将它们应用于不同的目标实体 -(请参阅 Attribute Targets)。 因此,查看我项目中的 AssemblyInfo.cs 文件,我可以看到
给定一个 Makefile: all: build/a build/b build/c # need to change this to all: build/* build/a:
我有一个带有多框架目标的项目- netstandard2.0;net471 . 我想为 netframework 构建解决方案和 netstandard分别。 目前我使用这个 MSBuild 命令:
我是一名优秀的程序员,十分优秀!