I think the point is that a conjecture or open question can be canon. Hilbert's problems are an example: https://en.wikipedia.org/wiki/Hilbert%27s_problems http

I think the point is that a conjecture or open question can be canon. Hilbert's problems are an example: https://en.wikipedia.org/wiki/Hilbert%27s_problems https://en.wikipedia.org/wiki/Hilbert%27s_problems The P=NP question would be an example of a canonical unsolved problem in CS.