What is difference between positive logic system negative logic system?

What is difference between positive logic system negative logic system?
If you would like to perform an action by energising to act ( Logic 1 = desired output) then it's positive logic. If you would like to perform an action by de-energising to act ( Logic 0 = desired output) then it's negative logic. Here is an example for the positive and negative logic POSITIVE LOGIC NEGATIVE LOGIC o/p Y = 1 (energise to act) o/p Y = 0 (de-energise to act) A B Y A B Y 1 1 1 1 1 0 1 0 0 1 0 1 0 1 0 0 1 1 0 0 0 0 0 1 any how the required action can be performed by using either a positive logic or a negative logic.
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