What? No. Instead we would be able to see steady increases of say 10 % per year as a straight line instead of this, where it appears to be ever larger increases and the first ones essentially invisible.
I am not sure if I understand you. Dissolved CO2 in water of like normal water. There is no crazy difference. If water can get to the rocks, so can the dissolved CO2.
The ocean dissolves a large amount of CO2, which then, just like in the rain example, can react with minerals. It can react faster if there is more surface area of said minerals.
This is really a non-issue, as the LLM itself should have no problem at setting a reasonable value itself. User wants a summary? Obviously maximum factual. He wants gaming ideas? Etc.
On the moon he is the alien. Otherwise/usually he is the human and others are the aliens, hence the emphasis that we can be aliens.