I prefer semi-philosophical ones but any are good...So I'll post an easy one..

If it returns to that from which it started, where is it now?

That depends on the starting time, velocity of the object, and length of the overall trip. One could also argue that we could not possibly guarantee that it returns to the position that it started in because of we do not know our absolute position in space. Or I could stop trying to be annoyingly over-technical.

This one is not philosophical at all, but geeky enough to make up for it. Why do programmers always get Christmas and Halloween mixed?

Select text below to see answer.
A: Because OCT 31 = DEC 25

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better answer would have been that Santa was a flesh eating zombie, and actually ate kids instead of giving them presents but yours is good too.

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VillageIdiot can have my babbies ;d

One of my favourite quotes, though relatively unknown is: "If we can only accept what we currently believe, we have already reached our full potential." Although if we were to be a little more philosophical about it, we'd modify it so that it's a question, so we can all discuss! Philosophical unity!

If we can only accept what we currently believe, have we have already reached our full potential?

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.

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VillageIdiot can have my babbies ;d