print('x y z w')
for x in range(2):
    for y in range(2):
        for z in range(2):
            for w in range(2):
                if (x and (not y)) or (y == z) or (not w) == False:
                    print(x, y, z, w)

 if (x and not y) or y == z or not w:

  
if not ((x and not y) or y == z or not w):

  
>>> print('x y z w')
x y z w
>>> for x in (0, 1):
...     for y in (0, 1):
...         for z in (0, 1):
...             for w in (0, 1):
...                 if not ((x and not y) or y == z or not w):
...                     print(x, y, z, w)
... 
0 0 1 1
0 1 0 1
1 1 0 1
>>>