>- You can't reach infinity That's the hard bit. The infinity could simply be an artefact of your description. You could for instance describe direction on a m

>- You can't reach infinity That's the hard bit. The infinity could simply be an artefact of your description. You could for instance describe direction on a map as 'miles east / miles north' and conclude that it's impossible to move due east or west but that's clearly not the case. A more sophisticated example would be the event horizon of a black hole, where several quantities seem to become infinite, but it turned out this wasn't the case with the right coordinate system, meaning that it's likely all too possible to cross the event horizon.