Nature of True Cognition
The true cognition in Buddhism is tautologically defined as directly knowing and seeing things as they are.

The explanation of this is threefold. 

First, this means a mode of cognition without a contradiction, not prone to contradicting evidence.

Second, it means a mode of cognition which, when taken as a  basis for decision-making and action, does not lead to conflict or suffering, but to peace.

Third, it is cognition that is an extension of the ontological nature beyond words, beyond generalizations and concepts, beyond discrete representation.

This last point means, this cognition is so featureless that it may seem like there's none, and yet it is actually a lot more accurate than our naive crude models we take for the truth.