The eternal mathematical debate settled by Reddit upvotes! The first post claiming "0 ∈ ℕ" (zero is a natural number) gets 54 upvotes, while the opposing view "0 ∉ ℕ" (zero is not a natural number) gets downvoted into oblivion with -27.
Mathematicians have argued about this for centuries, but who needs rigorous proofs when you have internet points? Democracy has spoken! Next up: solving the Riemann Hypothesis via Twitter poll.