Of course I agree with you, which only strengthens my argument. But anyone who thinks we need to make up words like "Marsquake" clearly disagrees with you, and

Of course I agree with you, which only strengthens my argument. But anyone who thinks we need to make up words like "Marsquake" clearly disagrees with you, and those are the people I am arguing against. It was a preemptive concession to ignore that point -- even if earth-the-material were named after Earth-the-planet, there's still no need to abandon the thousands of earth-related words as soon as we step foot on another planet. I felt that if I argued "Planet is named after material, therefore it's an earthquake" people would have missed the more important argument. (Not that any of this is particularly important.)