Yes, and they display the converse. It's the existence of the converse behaviour which is distinguishing. A machine which is just pruning a search space with a

Yes, and they display the converse. It's the existence of the converse behaviour which is distinguishing. A machine which is just pruning a search space with a low-quality valuation strategy isn't doing anything very impressive; only very fast. A human with a very high quality valuation technique, but a slow search pace, is relevantly impressive.