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Could and have are completely different words.
Yes. And saying that something could easily do something is saying that it has a high probability of doing that thing. Understand?
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is not necessarily true. The same comet could be on an orbit that would intercept earth at some point in the near future. How are we to know if we don't even know it's there?
Pedantry aside, though, you're wrong anyway. It is not necessarily true that a comet that crosses Jupiter's orbit won't hit Earth - but that's not what
I said. "might very well not" is also a statement about probability. I'm not saying it couldn't come close to Earth, I'm saying it's unlikely - that most comets that pass through Jupiter's orbit do not pass close to the Earth.
I like the diagram, though.
Edited, Jul 22nd 2009 2:09pm by Kavekk