Other good options

“Is it a boy or a girl”

“Yes” / “One of those” / “Almost certainly” etc

What if your compiler is compromised? https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf

It depends on the level of mistrust you’re willing to entertain but the short version is; no, you cannot be sure.

Ken Thompson’s 1983 talk, Reflections on trusting trust is the classic talk on just why you cannot be sure.

The point, is that people don’t like thinking about this subject, as evidenced by the fact that half of people don’t put plans in place even when it’s something as comparatively simple as a will unless they get more imminent prior warning. This is not a Linux kernel specific issue, Bram and vim being an obvious example. Something as potentially complicated as the Linux kernel succession? I can see why it wouldn’t be a subject the community was keen to tackle.

Have you got a will?
Estimated 50% of adults don’t. There’s always a more pleasant task on the to-do list to be getting on with.

There is a continuity process at least https://github.com/torvalds/linux/commit/102606402f4f5943266160e263c450fdfe4dd981 Although it is mainly, here is the process to figure out the plan.