I think you mistook the direction of that sentence slightly. I don't think there's much information around about giant squid, but it's likely that they're intel

I think you mistook the direction of that sentence slightly. I don't think there's much information around about giant squid, but it's likely that they're intelligent (by animal standards) because other squid are intelligent. https://en.wikipedia.org/wiki/Cephalopod_intelligence https://en.wikipedia.org/wiki/Cephalopod_intelligence By my interpretation of the sentence, the author isn't necessarily assuming intelligence from first principles in quite the same way as you did in the opposite sense.