Speaking in sentences and learning chess moves seems more due to having the physical capacity for speech (and therefore conversation) than something attributabl

Speaking in sentences and learning chess moves seems more due to having the physical capacity for speech (and therefore conversation) than something attributable to raw intelligence, and picking up a stool and moving it requires the ability to pick up and carry a stool, which would be pretty hard for crows or dolphins. I feel like any test of raw intelligence would need to be independent of physiology/ability to understand instructions, which is pretty hard to do.