What would happen?
I mean, would they annihilate?
There is no such thing as an anti-Black Hole in conventional physics. Could you be talking about something else?
No, When I say anti-black hole, I'm referring to a black hole collapsed from anti-matter.
They would merge into a single black hole. A black hole has no memory of what kind of material it formed out of.
"Black holes have no hair."
I guess that this is because all the energy in such a small space makes the particles kind of random (e=mc stuff) and destroys the information or what?
The real answer is that there is no way to get any information about what went into a hole, other than how much was there, and if it carried angular momentum.
Could there be a nugget of information inside the horizon? Sure, why not, but much like the tootsie roll at the center of a tootsie pop, until you figure out how to bite open a black hole, it's gone.
One, ta-hoooo, tha-reee... *crunch*
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