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DeMorgan’s law is a simple law that I learned at UPT during one of my hardware classes. While it is useful in hardware it, it is also useful when writing programs.

If you have a condition like not (A and B), you can rewrite it to !A or !B.

if __name__ == '__main__':    a = True    b = True    if not (a and b):        print("True")    else:        print("False")    if not a or not b:        print("True")    else:        print("False")