Transcendental idealism is the idea that peter and paul's perspectives intersect, making 'peter's consciousness' and 'paul's consciousness' communicate because they share in a pre-personal consciousness demanded by the very definition of consciousness, or sense, of, truth.
Transcendental idealism is a school of thought which treats the world as a unity of validity indivisible between peter and paul -their perspectives intersect in such a way that we say they communicate, -the perception of the world 'by peter' is not peter's doing -but it is the doing of pre-personal consciousness, whose communication raises no problem, since it is demanded by the very definition of consciousness, or sense, of, truth.