Is it possible that large crocodylians such as Deinosuchus and Purussaurus could have had levels of intelligence similar to that of say, elephants?
Could larger body sizes equal higher intelligence? Crocodylians are already very intelligent, so I think it may be possible that as their body sizes increase, so do their levels of intelligence.
This may seem impossible at first, but this has happened with other archosaurs as well. Tyrannosaurus is possibly the best example of this. Its relatives likely had intelligence comparable to that of bears and wolves, but as it got larger, its intelligence became more comparable to that of primates and corvids.
I suppose to prove this we'd have to scan the brain case of a deinosuchus or purussaurus.
This has to be the most elaborite shower thought I've ever come up with.