Board Thread:General Discussion/@comment-26066818-20151011135048/@comment-1713281-20151012155747

It all comes down to those murky areas of assumption and topical appearances. Is the Earth-616 Winston Churchill dead? Yeah, almost definitely. But, we don't have any actual comic source to prove that. Another good example is the 39 deceased Presidents of the United States that appeared in that Dead Presidents arc in Deadpool Vol 3. Sure, that arc proved that they were all dead on Earth-616, since they came back as zombies via necromancy. But, I don't think anyone assumed before that Arc that Andrew Jackson was still alive at 205 years old.

If in doubt, follow the example on the Nelson Mandela (Earth-616) page. Let his history section end with his last appearance, and note that the real life Churchill is dead in the notes, thought it's not been mentioned in-universe.