Proving evolution?

[Angrboda]

Any given theory -of- gravity may, at least potentially, end up being proven false..but it would not be possible to prove that gravity were false.

Does this also sound like an equivocation? I think Nudger made a reasonably clear distinction between the theory of evolution and evolution.

The term biological evolution is using 'evolution' in a more limited sense than the sense in which evolution simply means 'change'.  They are two distinct meanings/senses, thus using one to comment on the other is an equivocation.

To use your example term, it would be akin to saying, "The theory of gravity is false because gravity means a matter having great weight and the theory of gravity has no defined weight."

A clearer explanation would be thus: Evolution in the field of biology refers to the change in alleles in populations of biological organisms. Evolution in the sense that Nudger used it the second time simply means change, but not of a specific type. All organisms are undergoing change all the time, but the change which biology terms evolution is not occurring all the time, as changes in alleles in populations only occur at the birth / conception of a new organism. Thus the two meanings of evolution are distinct and Nudger was using two different definitions of change in the same comparison.