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- Are black holes really singularities? 3 answers
Edit: I don't think this is a duplicate. [***]
Question: Based on our current observations, what prevents a black from experiencing any sort of repulsive force to overcome its gravitational force and ultimately become not a black hole? [**]
Clarifications to the question
By "current observations" I mean theories/equations that have observation to back them up, and aren't hypothetical.
By "black hole" I am not referring to micro black holes.
My own attempt to answer the question
Since there are (4) fundamental forces[*], let's look at each as potential candidate:
Gravity is what holds a black hole together and is attractive, so unless there is "anti-gravity"[*] gravity will not be responsible for apart a black hole.
The strong nuclear force has never been observed on large distances (I think) so I don't know how it could affect a black hole.
The weak nuclear force seems like a candidate, based on my understanding. The decay we've observed appears random, so it's possible for the matter within a black hole to decay. By being random over enough time has an expected value of having "lucky spurts" of weak force over large enough time may play a part in tearing apart a black hole. Given a chance of $0.0 < p < 1.0$ of something happening (such as a "lucky spurt" of weak decay) within some time duration $t$, for some observer, it has a $1-p$ chance of not happening within $t$. Since $0.0<1-p<1.0$, $(1-p)^n<0.5$ for some integer $n>0$, which means if you wait $n*t$ durations for a "lucky spurt" of weak decay to happen you have a lower chance of it not happening than it happening, so it will "probably" happen. (Any "lucky spurt" of decays that has the highest probability to happen would probably be just a small amount of mass reduction and would be more likely to happen than "hyper-lucky spurt" decay ejecting a large amount of mass, so this decay would happen very gradually, but maybe have an occasional burst, most likely, and now this sounds like it would be related to Hawking radiation which I think can shrink a black hole gradually, but I don't know much about it, although a search for the text "weak" on its Wikipedia page didn't show anything mention of the weak force as its culprit.)
The electric force seems like a candidate, as well, based on my understanding. What's stopping a black hole from accepting new charged particles unless the increase of repulsive electric force from charge is somehow nullified by a corresponding increase in gravity by the mass carrying the charge (assuming charge implies a mass carrying that charge) or somehow the black hole can repulse additional charge from entering its event horizon in the first place. I found a few questions on this site relating to black holes from gaining arbitrarily high electric charge ("Charging a black hole?", "What prevents the accumulation of charge in a black hole?") but their answers were either dense that I couldn't understand it in a short amount of time or seemed slightly implausible (i.e. Why isn't Coulomb repulsion overcome by sufficiently high velocity at the optimal direction?).
Therefore, a good answer to this question would explain why weak and electric forces are not good candidate forces to tear apart a black hole based on observation (and confirm my understanding about gravity and strong force to not be candidates, either). (Links that provide the answer are okay, of course.)
[*] While I'm completely open-minded to the existence of additional fundamental forces and/or anti-gravity when/if it is observed, it has not been observed, so it doesn't meet the criteria of my question.
[**] If you think any part of this question can be improved, you're probably right - feel free to do it, particularly if you think the spirit of my question is still captured and it makes this question no less a fit for the content of this site. I don't know much physics and I know even less about what is appropriate to assume the answerer's (and future readers) will know and err on the side of verbose.
[***] Though I can't see for sure, I'm guessing people are voting to close this question because of this one: "Are black holes really singularities?".
That question is asking about seems to be asking if some repulsive force prevents black holes from being able to form in the first place. The answers are about answering whether or not black holes can form in the first place. That is a different question than mine, which is assuming black holes are able to form, in accordance to our observations, are they able to un-form. All (3) of the answers support my interpretation of the other question:
Another (downvoted) answer says this:
[Like OP predicts,] Black holes do not have singularities. Since all matter of a black hole is located in its spherical shell, the internal spacetime is flat.... if some matter was inside the spherical shell, there would be information loss paradox.
And another says this:
To those who add a close vote after reading this: can you comment to me why my question is considered a duplicate/why my interpretation given above is wrong so I can better learn the rules of this community and submit appropriate content?