I wonder if it's illogical to think that all civilizations must always pick the most logical of the options

Logical and optimum are not the same.

yetihehe 2 days ago | parent | prev [-]

Those civilisations that make too much illogical choices probably die off.

	▲	ithkuil 2 days ago \| parent [-]
		True. But it's not a binary choice. All it takes is to make one sub-optmial choice for the universe to be filled up with von-neuman probes in all star systems