Trying to imagine objects in higher than 3 spatial dimensions.
Imagining 2 or more temporal dimensions.
Designing a system of governance that is fair to all constituents, physically realizable, and marketable enough to convince future constituents to follow it.
This one’s actually kind of easy. The plot of Back to the Future (and every other time travel story where changing the past is possible) doesn’t work unless there’s more than one timelike dimension.
Trying to imagine objects in higher than 3 spatial dimensions.
Imagining 2 or more temporal dimensions.
Designing a system of governance that is fair to all constituents, physically realizable, and marketable enough to convince future constituents to follow it.
This one’s actually kind of easy. The plot of Back to the Future (and every other time travel story where changing the past is possible) doesn’t work unless there’s more than one timelike dimension.