I recently viewed a home made video on YouTube showing a possibly drugged, extremely angry young lady who was ranting wildly in rather moderate English because creationists have the temerity to repeat that 'evolution is not proved but merely a theory'.In one sense she was perfectly correct to criticise - but not quite in the way she would have meant it!
The point being that evolution is emphatically NOT a theory. It is a mere hypothesis!
To be 'a theory' it would have to be capable of 'being tested' - and it ain't! That is what I was taught at school and it is a term which is clearly in the process of being redefined to add a degree of plausibility to evolutionist claims and assertions.
Definitions:
A supposition; a proposition or principle which is supposed or taken for granted, in order to draw a conclusion or inference for proof of the point in question; something not proved, but J. S. Mill. [1913 Webster]