CONTRADICTION, noun [Latin]

1. An assertion of the contrary to what has been said or affirmed; denial; contrary declaration.

2. Opposition, whether by words, reproaches or attempts to defeat.

Consider him that endured such contradiction of sinners against himself. Hebrews 12:3.

3. Direct opposition or repugnancy; inconsistency with itself; incongruity or contrariety of things, words, thoughts or propositions. These theorems involve a contradiction

If we perceive truth, we thereby perceive whatever is false in contradiction to it.