Planetary bodies differ from one another in their composition, but most of those in the Solar System have solid surfa...
Logan-FryeMarch 6, 2019
S&N Condition
shouldn't this condition be diagrammed as: SS & -R > HP rather than -R>HP
Any planetary body with a solid surface whose surface is not renewed for millions of years becomes heavily pockmarked by meteorite craters, just like the Earth's Moon.
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I think that diagraming that clause as SS & -R > HP is exactly right.
Then we have the last clause, that tells us that Europa is
NOT HP (very few meteorite craters), so we know from the contrapositive that it is not SS OR R.
We also got from that clause that it is SS, so it must be R. We know from clause 2 that R means that the core of that planet generates enough heat to cause volcanic action. (We know this from “unlessâ€.)
And that gets us right to answer E: some very cold planetary bodies (at least Europa) has a core that generates enough heat to cause volcanic action.
