(atom)
Return the literal fact of an atom.

    Effectively, this merely strips the Not around a fact.
Return the literal fact of an atom.
Return the literal fact of an atom .
def _base_fact(atom):
    """Return the literal fact of an atom.

    Effectively, this merely strips the Not around a fact.
    """
    if isinstance(atom, Not):
        return atom.arg
    else:
        return atom
def _base_fact ( atom ) : if isinstance ( atom , Not ) : return atom . arg else : return atom