Example : Did Nazis use alternatives to Zyklon B?
On one hand, it's NOT notable, by any stretch ("according to my dad").
On the other hand, it's already well-answered, a while back. So the main reason to VTC as not notable (will distract site resources on non-notable claims) seems to not matter anymore.
UPDATE: This is just an example that made me ask the question. That specific question may have been notable from other users' POV. What I'm asking is, "assuming the old question is NOT notable, without dispute...".