Here is some real computer code. Explained:
John Wilder: the double-dot is a flip-flop operator when used in a conditional. The flip-flop is turned on by the first expression’s truth and turned off by the second expression’s truth. The tricky thing about the flip-flop is that it keeps the on/off state inside, so once it’s turned on by the opening expression, it says on until the closing expression is proven true. why the lucky stiff
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