a metaphoric adjective describing situations where it is not clear which of two events should be considered the cause and which should be considered the effect

I guess the overtones are a product of their times. Currently, it seems to be: is science/religion the “cause” or “effect”.

I always staked claim that it was a “scientific vs philosophical” question; but I never considered how timeline could change the overtones or underlying thinking of “The chicken and the egg” concept. Neat