How can bobby fischer's cognition and intelligence be so high if he suffered from schizophrenia?

Schizophrenia is neurodegenerative and impairs cognition heavily, many who are diagnosed have low IQ. It is wild to both have this condition and be a top tier chess player and score 180 on IQ test. How is it possible?

whoa big words

For you, yes.

Well, Nikola Tesla suffered similar problems...  It happens.  There are always exceptions.

Same to Unabomber, aka. Ted Kaczynski, measured 167 IQ PhD math professor, paranoid schizophrenia diagnosed. Do you see the pattern?

Because Fischer never scored 180 on an IQ test.

Schizophrenia isn't neuro degenerative in the conventional sense - perhaps it can be shown that the parts of cognition that relate to social function can degrade overtime, I am not sure how one could quantify that as easily as one wold say quantify the decline with Alzheimers.

John Nash, who I would put about 7 or 8 levels above Bobby Fischer had very profound schizophrenia and yet produce paradigm shifting work in mathematics. Bobby Fischer could play a board game, John Nash could redefine how the entire world interacted with numbers.

@1

"He definitely was not schizophrenic" said psychiatrist Magnús Skúlason, who discussed with Fischer in Iceland.

@6
Yes, Fischer scored 180 on an IQ test
Brady, Frank (2011). Endgame: Bobby Fischer's Remarkable Rise and Fall – from America's Brightest Prodigy to the Edge of Madness (1st ed.). Crown. ISBN 978-0-307-46390-6.

He's HIM

Just because a few of us have been writing our Manifestos doesn’t mean we’re crazy!

Have you read the transcript of his radio interview with the Philippine radio station?

He very clearly had bigger problems than "bored and old".

Is there a link to this?

in my manifesto all crazy people will be put up against a wall and shot, as thats a crazy belief i will have to have myself shot too...!!!

Or, rather, after Fischer had become a famous chess player, someone assessed his IQ as having been 180. If he hadn’t become a famous chess player I guess no one would have bothered making up such a number…

just joking btw. i am schizophrenic and have a high iq, how i would describe schizophrenia is as the mind being bound by its own ideas and if people recognise it themselves that are doing the binding they can 'cure' themselves of it, it is actually over thinking not under thinking.

@18
That was in 1952, when Fischer was 9 years old.
He was tested because he had problems with schools.

I think it's some form of savantism

Savant syndrome is where a person who is intellectually lacking in one or more fields is prodigous in certain fields. 

i am not kidding when i say i am intelligent i have a 2.1 hons in physics and a degree equivalent computer programming and have had a 2350 elo online rating the same as gms on the sites from 1997-2001

last time i did n iq test in the logic ones i scored 95 and 97% the results were quantified as being the percentage of graduates you would have a greater score than , in the test.  This was done in 1989 when only the top 10% of people were graduates.