can a python tell whos its owner is?

[littleindiangirl]

You're thinking of the 'layman's' meaning for theory, which is more like a hypothesis. (Basically a 'guess' before you do the proper testing and such)

A scientific theory is 'an explanation for a set of established facts'.

So, we know, without a doubt, that species change from generation to generation, often diverging into new and different species given enough time and other factors.

The theory of evolution is trying to find out the 'how and why'. The current accepted theory is natural selection.

I know what I meant when I wrote that, it was an example to make a point, perhaps rereading it will help?