After 100 years in QM we do not know
simple matrix formulation in odd number i.e (3×3);(5×5);(7×7) and so on so . This implies we do not full understanding in Parity operator . Similarly T the time reversal operator .
But we claim that we know many things . In my small understanding
we are on the surface of water and do not know the depth of water . If you do not agree then give your view or write the matrix for my PT model .
Sorry to say like this.