This is forbidden according to quantum mechanics
because quantum mechanics says information is conserved
but the theory of black holes says
this is totally okay and information can get destroyed
and this is really recall the black hole information paradox
one theory says black holes destroy information
and the other theory says
I do not like black holes because according to me information has to be conserved
And the reason why this is troubling is because these two theories
quantum mechanics and general theory of relativity is really all we have
we have some other candidates like string theory and stuff like that
but nobody knows the actually theory of everything
These two theories are really all we have
and they contradict each other at very very very fundamental level
when it comes to the conservation of information.
And to this trouble brings to us very important questions like:
is one of them wrong?
are maybe both of them wrong?
So, I do not know, I think anyone knows, but one thing is clear
that we need to understand black holes better
in order to answer this kind of question and hopefully one day it saves physics!
That is all.
