Anyone at ANY age can become a GM !

I believe it 100% .

All you need is make some sacrifices , have some assets, and most importantly strong or better say titanium desire.

First let's talk about time line here ( it may vary of course person to person, but that's about accurate).

Age group : Under 20 years of age (starting chess) .

10-15 years to become a GM 

20 years - 40 years (starting chess)

15-20 years to achieve GM 

40 years + (starting chess) 

Very individual cases, will depend alot on your health conditions, especially memory and specific age etc... 

If someone in speacial cases is very healthy , and not too old and brilliant memory etc...

I would say it is still possible to achieve GM , but minimum would require 20 years trying to accomplish.

60+( starting chess)

I would say no chance, due to decrease in desire, concentration, health problems etc.. 

Best you are looking at FM title minimum 20-25 years time 

My point being almost anyone can achieve a GM title is just not many adults willing to sacrifice 20 years of their life , spending millions of dollars just to achieve GM title and be poor again.

And that's exactlywhy we don't see so many adults becoming GMs not because it's impossible,but because it's worthless. 

I agree. The younger you are, the more time you have plus desire and mental elasticity. I firmly believe that attitude plus spending your time training wisely with focus will get most people to GM level.

Haven't you contradicted yourself? You say that anyone can become a GM but it varies. Variance means that some people simple do not have the necessary mental and physical capacity to achieve that goal. I am one of those people unfortunately, but I'm fine with that.

Your point would be more convincing if you could name just one GM who learned the game after the age of 20.

He was a GM by the time he was thirteen... eleven years before he "learned how to play chess"?

Now try again, but without just making up your own "facts".

Akiba Rubenstein learned the game at 16 and went on to become one of the greatest players ever

Well, theoretically one can. It has never been observed though. An adult starter won't be IM today (if he is lucky and talented he will achieve FM niveau). Show me a recent one.  

PS: those 100 year old fairy-tales, a couple of chess players world-wide - we live today!

PPS: I started at 16 and had probably absolved several times "the 10.000 hours". Hard work, guys!

My advice to you would be similar as a movie get rich or try dying, shoot for GM title or die trying !

Of course if you have some health issues don't go so hard on yourself and maybe shoot for FM title first.

You can do research yourself.

It's more if anyone after 20 tried to go ALL in and sacrifice their live (most of it) to achieve GM title. 

Just REMEMBER something getting a GM title is EXPENSIVE! !!! Like really expensive.

As an example if you are already a GM strength and planning on getting it officially you are looking at about 5000€ ( 5 thousand euros) .

This is not a joke I actually know this.

So many people WOULD be getting titles CM, NM, FM, I'M. , GM , but who's going to support them?  Especially after 20!

OK

An adult started WILL be an IM ! 

you saying "show me one", we'll now I'm asking you show me a sponsor who's willing to pay his bills , take away all his problems, provide proper nutrition for him and so on for about 20 years show me one please ! 

I'm 100% sure if we take couple of adults and their everyday goal would be just increasing their rating and no worrying about anything else in life  (family, finances, problems , etc) I'm sure many of them would achieve IM titles and few would achieve GM 

So what's your point? Are you offering your sponsorship?

Exactly!  

No one knows what our bodies , especially brains are capable of in the right conditions given

Are you saying chess hustlers if sponsored would reach GM after say 10 years? I knew few who have potential and unemployed for many years.

If children's brains were so much better suited to learning than adults', only children would ever get a Ph.D. And chess isn't rocket science, it's just a game. Sure, it requires pattern recognition and problem solving abilities, but so do most branches of science. How many people become scientists anyway? A very small percentage. Not everyone can do it, however most people can acquire a decent level of general knowledge. I don't buy into this age thing. Most people (adults and children) don't have what it takes to become a GM. It's as simple as that. And of the few adults who do, the majority have reached a point in life where they have already chosen a career, so they won't invest tens of thousands of hours into something that most likely will never pay off. 

Playing chess well is not accumulating dry knowledge, say declarative wisdom. It is more a procedure, a procedural skill. In other words: more „can“ than „know“. It that respect young people overtake older ones by far.

Older people who devote hundreds of hours to chess often fail miserably to become average, say 1800 otb. 

It is equally ridiculous to make a world-class athlete out of an untrained twen. You have rigid bones as well as a rigid brain. You cannot extrapolate a point zero to world-class format.

Yes if sponsored they would reach GM , if they really want it themselves of course.

Take a typical chess hustler around B class strength. Give him 6 different GM's (everyday new GM teaches him,different styles,different approaches,new information etc... ) , 6 days a week 12-15 hours of study, proper nutrition, vitamins, brain supplements, day offs fitness  (swimming ) . 10 years time with consistent work I don't see why not.

"I'm 100% sure if we take couple of adults and their everyday goal would be just increasing their rating and no worrying about anything else in life  (family, finances, problems , etc) I'm sure many of them would achieve IM titles and few would achieve GM "

As we all know, it is very common to be both 100% sure and 100% wrong! Here is another in a long list of examples