Cambalache 3,14 - La vidriera irrespetuosa

Double a square is never a square,
and here is the reason why:
If m-squared were equal to two n-squared,
then to their prime factors we’d fly.
But the decomposition that lies on the left
had all of its exponents even,
But the power of two on the right must be odd,
so one of the twos is “bereaven”!