def Implies(p, q, simplify=True):
    """Expression implication operator

    If *simplify* is ``True``, return a simplified expression.
    """
    p = Expression.box(p).node
    q = Expression.box(q).node
    y = exprnode.impl(p, q)
    if simplify:
        y = y.simplify()
    return _expr(y)
Expression implication operator

    If *simplify* is ``True``, return a simplified expression.