Python entails Examples

Example #1

File: compare_global_simple.py Project: asteroidhouse/equibel

def strictly_stronger(S,T):
    """Returns True if every formula in S entails the corresponding formula in T."""
    for node in S:
        s_formula = S.formula_conj(node)
        t_formula = T.formula_conj(node)
        if not entails(t_formula, [s_formula]):
            return False
    return True

Example #2

File: test_inference.py Project: varunjha089/sympy

def test_entails():
    A, B, C = symbols('A, B, C')
    assert entails(A, [A >> B, ~B]) is False
    assert entails(B, [Equivalent(A, B), A]) is True
    assert entails((A >> B) >> (~A >> ~B)) is False
    assert entails((A >> B) >> (~B >> ~A)) is True

Example #3

File: test_inference.py Project: A-turing-machine/sympy

def test_entails():
    A, B, C = symbols('A, B, C')
    assert entails(A, [A >> B, ~B]) is False
    assert entails(B, [Equivalent(A, B), A]) is True
    assert entails((A >> B) >> (~A >> ~B)) is False
    assert entails((A >> B) >> (~B >> ~A)) is True