[ensiferum]

But if it can be built.. then it's not impossible.

Hence the topic should be "Build possible programs".

[Senderman]

I'm pretty sure the implied sentiment is "Build programs that look impossible because they might turn out to be possible."

[princekolt]

If you use a really large telescope, say, 3500mm, you might be able to spot the point, which you missed, about 3 light years from where you are right now.

[wscott]

Don't assume something is impossible. Or assume that if your idea was any good then someone else would have already done it.