I have the same question as daffodil77 about citation expectations. In the first example, the perspectives were explicitly cited, but this example does not do this. It does say "some may respond," but who.

@keily_silva but how do we know that "up" is towards hot and not cold. I agree they are both increasing, but do we have to apply 'common sense' to say that when English speakers talk about temperatures increasing they are strictly talking about things getting hotter?

How can I tell this passage has multiple perspectives? I thought it was a single pov (author only), stating potential hypothesis.

Is should a necessary condition indicator?

For this question type, would it be possible to arrive at correct answer if I only read Simpson's portion, ignoring the first stimulus?