What one thing would disprove Christianity to you?

[Tea Earl Grey Hot]

To the Christians on the forum: What one (and only one) thing would, if shown to be true, disprove Christianity entirely for you?

The existence of a single non-Christian worldview that is self-attesting, logically coherent, and consistent both with itself and the world in which we live.

Firstly, the supposed absence of such a worldview does not entail the truthfulness of Christianity.

"self-attesting"

If by "self-attesting" you mean has "evidence" to back up its core claims such as resurrection, then I'd argue the evidence for that is shabbier than that for aliens crashing in Roswell.

Even if the resurrection occurred, it is a complete non-sequitor to conclude that Jesus was divine and that Christianity is true. For all we know it could have been a trick by interstellar scientists testing the gullibility of pre-modern humans.

"logically coherent"
It has been shown numerous times that there are contradictions in the bible. The only responses by apologists have been ad hoc rationalizations.

"consistent with itself and the world in which we live"
Something can be false but still be internally consistent. Fantasy stories can be internally consistent but they're not true in reality. As for external consistency, I have never seen devils, nor angels, nor heaven or hell, nor this "spirit" that I'm suppose to have, nor do I see people being brought back to life, etc. Hardly what I would call external consistency.