Detecting design or intent in nature

[Mudhammam]

There are multiple ways intellects can come into existence so you can't assume any particular intellect was the product of an evolutionary system.

I don't have to assume anything. The only examples that exist (apart from human designs, borrowing principles from nature) such as you, me, and every other animal that has a brain, are the results of evolution.

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Altruism benefits another individual but not the species

OK, I'm still confuged.
If evolution is solely about changes in gene frequency, then why think that there are benefits for individuals and not the species? I don't see how you can accept one and reject the other.

If my girlfriend wasn't beckoning I would try to explain it further but there's A LOT of literature available online about the differences between kin selection and group selection. I see your point about Coyne's wording being a little confusing though.