feat: arbitrary solutions for thm/ax challenges #7
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We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. This allows challenges that demand the construction of terms of non-Prop types. Fixes #3 (mostly) Closes leanprover#5 (better alternative)
JasonGross
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This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
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This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
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JasonGross
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This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
JasonGross
added a commit
to JasonGross/comparator
that referenced
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Dec 20, 2025
This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
JasonGross
added a commit
to JasonGross/comparator
that referenced
this pull request
Dec 20, 2025
This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
JasonGross
added a commit
to JasonGross/comparator
that referenced
this pull request
Dec 20, 2025
This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
JasonGross
added a commit
to JasonGross/comparator
that referenced
this pull request
Dec 20, 2025
This PR allows challenges that demand the construction of terms of non-Prop types. We remove the error "Challenge and solution constant kind don't match" in favor of permitting any kind of solution to a challenge that is a theorem or axiom. Note that permitted axioms must still be declared as axioms or theorems in the solution; it would invite inconsistency if we allowed instantiating informative axioms with definitions. The optional field "allow_partial" indicates whether or not challenges may be solved with `partial def` solutions. We uniformly forbid unsafe solutions. We rely on the Lean kernel to mark as unsafe (resp. partial) any definitions that make use of unsafe (resp. partial) dependencies. Axioms is now responsible for ensuring that solutions to challenges are present and have valid kinds (no forbidden axioms recursively; only partial if permitted; not unsafe) Compare is is responsible for ensuring that: - targets are present and are axioms or theorems in the challenge file - targets have the same type in the challenge and solution - any dependency of a solution, which is not an explicit target, and which occurs in both the challenge and the solution, has the same contents in both Fixes #3 (mostly) Fixes #4 Closes leanprover#5 Closes leanprover#6 Closes leanprover#7
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We remove the error "Challenge and solution constant kind don't match"
in favor of permitting any kind of solution to a challenge that is a
theorem or axiom.
Note that permitted axioms must still be declared as axioms or theorems
in the solution; it would invite inconsistency if we allowed
instantiating informative axioms with definitions.
This allows challenges that demand the construction of terms of non-Prop
types.
Fixes #3 (mostly)
Closes #5 (better alternative)