We are considering an abstract logical transformation <math>F = (f, g) : [u, v] \to [x, y]</math> that can be interpreted in a number of different ways. Let's fix on a couple of major variants that might be indicated as follows: | We are considering an abstract logical transformation <math>F = (f, g) : [u, v] \to [x, y]</math> that can be interpreted in a number of different ways. Let's fix on a couple of major variants that might be indicated as follows: |