What is space? Is space merely extension? What makes up extension, but a set of locations?
What is time? Is time merely duration? What makes up duration, but a series of successions?
Is space a void for things to be located in, or do things create the space between them?
Is time a continuance for events to happen in, or do events create the time that joins them?
Does space and time exist objectively, or only subjectively? Are they absolute or are they relative?
Does space and time enframe all that exists? Does anything exist outside of space or time? How could we know if it did?
What is spacetime? Is it space plus time, disjoint, or is it a reciprocal enfolding of space and time, so that neither can exist without the other?