I suppose, if the definition of "weird" is loosely-related to "low probability of truth" or "wildly deviant from existing orthodoxy," the highest-upside ideas would seem to be "weird."
In that vein, the question is how many "weird" ideas can your portfolio of time and money afford at any point?
In that vein, the question is how many "weird" ideas can your portfolio of time and money afford at any point?