"but rather argued that evolutionism does that because its adherents conflate it with operational science."

Ham used the phrase "Historical Science" and falsely claimed a difference between that and "Observation Science" Of course he conveniently left out that we can observe evidence that the Universe is more than 6,000 year old in more than myriad places. Mr Nye covered that point quite well and that has been discussed on another thread.

I've never seen or heard of "operational science" before. Do you mean engineering? Do you mean surgery? If you got the definition from someone other than Mr. Ham would you please explain what it is?