This was highly effective when I used it in real life.

The conspiracy theorist got real mad demanding I name sources, I kept telling him to find it on the internet with fake search terms.

I once got on the topic of the moon lending with a creationist co-worker. He said he wasn't sure, but that if it happened we should be able to see it from satellite pictures. So I said "yeah you can", pulled it up, and zoomed in on a landing site. You couldn't see footprints or anything, but you could see the shadow of the flag next to clearly man-made debris

I showed him exactly what he agreed would be proof in a difficult to fake form, and it just temporarily nudged the needle for him

Now, I fight conspiracies with the opposite conspiracies.

Earth is a 4D hypersphere, the earth isn't hollow, Agatha is just another part of the surface reached by holes

The elites are hiding all the best vaccines, like the ones that cure cancer