Well of course black holes are an illusion
... they are an extrapolation of the math of GR and even Dr A felt such a step was unjustified
...however for what ever reason they have become a favorite flavour of both scientists and lay people... I blame the movies..scientists get to feel they have a conection to something trippy
..as the movies train the public to believe... and the public are just as inclined to believe in black holes as much they are about to believe the latest "buffy" or "supernatural" tv dribble..yes bribble... so where do we get the black hole concept..from math extrapolation from a theory that says we can understand the Universe and gravity if we think about a human in a lift.. no I am not kind to GR but its influence on finding what we expect and want to find must be halted... remember the math of gr will be correct.. it is not the math that holds any fault but the premise upon which it is built offers room for extreme doubt as to rightfull application and therefore doubt as to any propositon built from such original premise... GR gives us black holes and dark matter and conveniently we can see neither... well math will not convince me the original premise was reasonable... dark matter..90% of our universe whatever we cant see..really who can buy that????
The suggestion that a black hole system comes from a binary relationship offers more reasonable expalaination of the observations than does GR
... I believe we will not find a single "black hole" but a binary system the creates exterme gravitational influences... such a system offers better explaination of the "jets" and gr for me glosses over exactly how such jets can be generated..(that is my view based on a limited view etc and I am happy to be corrected in the interest of gaining better knowledge)...
So I say that black holes and there reality are not established... and dont give me a list from NASA their list is of spots that show signs consistent with the presence of a black hole on their approach to their existence...
AND on all this I am sure no one will disagree now that I have explained it so well
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alex