Is free will a myth?

[Peh]

WolfpackN64 said:
It's a sociologically proven fact free will exist, as long as you take into account education, upbringing, job, family, friends and other sources of influence.

So no, free will does exist.

I just put "It's a sociologically proven fact free will exists" into google and that was the first link:

https://jaymans.wordpress.com/2013/09/25/no-you-dont-have-free-will-and-this-is-why/

Any source you could provide of this so called proof?