Is free will a myth?

[Peh]

SvennoJ said:
Only an outside observer can accurately predict or rather see the future.

I'll just want to add something to this sentence here:

As long as this observer is not able to manipulate our universe, he will be able to see the future.

I came to the conclusion, that someone who can both, change the future and see it, won't be able to see the future he wants to change. He alone is the disturbance who makes it impossible to see it for himself.

That's simply because knowing the future, is what changes the future.