Adjective

(en-adj)

Of high or especially quick cognitive capacity, bright.

*{{quote-book, year=1927, author= F. E. Penny

, chapter=5, title= Pulling the Strings , passage=Anstruther laughed good-naturedly. “[…] I shall take out half a dozen intelligent maistries from our Press and get them to give our villagers instruction when they begin work and when they are in the fields.”}}

Well thought-out, well considered.

Characterized by thoughtful interaction.

Having the same level of brain power as mankind.

Having an environment-sensing automatically-invoked built-in computer capability.

Adjective

(er)

quickly and critically discerning

shrewd or crafty

* 2014 , A teacher, " Choosing a primary school: a teacher's guide for parents", The Guardian , 23 September 2014:

The best headteachers are like submarine captains – cool-headed, astute decision-makers – who trust their colleagues and surroundings to indicate where their ship is headed.