“… a universe is a collection of objects that are spatially related to each other, and are spatially related to nothing outside that collection (this second clause is needed to prevent my slippers, for example, constituting a universe by themselves).”
“‘By convention sweet, by convention bitter, by convention hot, by convention cold, by convention colour, but in reality atoms and void.’” (channeling Democritus)
“Ironically, since his name for it has stuck, Hoyle himself did not believe in the Big Bang, and developed an alternative ’steady state’ theory of the universe.”
“Of course, at every instant, an object is at zero distance from itself at that same instant, but it is not necessarily at zero distance from itself at other instances.”