Had another round of my pet argument, referring to scientific theory as fact. I stand my ground because of theists.

Theists claim they have all the answers, that there is no point seeking anymore. They have it all sussed and written down in their "goat herders guide to the galaxy", for Abraham follows anyway.
So when you argue for science, I think it's important to point out science doesn't claim to know it all, we are still sussing things out. That new evidence will change our minds, unlike them.

So why claim scientific theory is fact when we also acknowledge it may change? It sounds arrogant that statement, it is a " know all" arrogant statement which is not true unless you claim science does know it all.
I fully understand certain theories, evolution one, are so close to being fact, it is not funny. But I feel you leave yourself open to counter argument by claiming theory IS fact. For when they counter "would you change your mind with new evidence?" and you reply "yes", the easy counter is " Then how could it have been fact previously?".
Admit science is still learning, it doesn't know it all. For this is the reason science is superior to theist ideology, because we still wonder and search. We still discover.

Theists claim perfection, so claim fallibility to counter.