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⟩ What is the difference between c = foo ? a b; and if (foo) c = a; else c = b;

The ? merges answers if the condition is "x", so for instance if foo = 1'bx, a = 'b10, and b = 'b11, you'd get c = 'b1x.

On the other hand, if treats Xs or Zs as FALSE, so you'd always get c = b.

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