Add is_false

resolution.py

@@ -1,6 +1,7 @@
 from emis_funky_funktions import *
 
 from itertools import combinations, product
+from operator import eq
 from typing import Collection, FrozenSet, TypeAlias
 
 from ir import Clause, Clause_, IRNeg, IRProp, IRTerm, IRVar, Substitutions, sub_all, unify
@@ -134,6 +135,10 @@ def derive2(kb1: KnowledgeBase_, kb2: KnowledgeBase_) -> KnowledgeBase:
         for clause in merge_clauses(c1, c2)
     )
 
+is_false: Callable[[Clause_], bool] = c(p(eq, 0), len)
+"""
+Determines whether a clause is equivalent to false
+
 if __name__ == '__main__':
 	import doctest
 	doctest.testmod()