Erudite and intellectually demanding, he was a gentle and sensitive man.

I work in what would often be considered an intellectually demanding profession.

It was not an intellectually demanding job, but he did it scrupulously, in accordance with the manual.

It was not intellectually demanding or particularly intricate--just hard.

She has written an intellectually demanding, sophisticated and distinguished book.

Nursing school has been intellectually demanding and all-consuming.

Pokémon, by contrast, centers on an intellectually demanding game.

I don't undertake any of these intellectually demanding activities while talking on the phone with my fiance, or anyone else.

This problem can be notably pronounced, causing significant difficulty in functioning for those involved in intellectually demanding activities.

These stereotypes have been disputed by authors who consider contributing to a larger setting "intellectually demanding."