I'm in a dilemma here.

I don't know what to believe. If you consider the uncertainty principles in physics the the future is changeable and can't be predicted. But this uncertainty principles only says that we can't measure some thing at the same time to an arbitrary precision.

For example is we measure speed and place at the same time we can only know 1 very precise.

But I for example we know every single property of every single thing that exists. And we know all the formulas. Then theoretical we should be able to calculate exactly what will happen.

At a single moment everything has a place and velocity and a lot of other things. And the rules are always the same. So I should be possible to predict everything is we know everything.

This got me confused. I believe that the uncertainty principle is true but that only applies to measuring things. That doesn't say the future is changeable.

What is wrong in my thinking?