The medium limits the ability to pick up on visual or social clues, makes immediate feedback difficult and can often be seen as impersonal.

He's so big on hints and clues, it must mean something.

Crosswords - fill answers into boxes based on specified clues.

"You did that on remarkably few clues," she said.

More surprises will come, because Wall Street has proved slow to pick up on such clues.

I must say we seem a little shy on clues.

Obviously, the exact direction will depend on clues such as the speaker's facial expression or tone of voice.

The choice is made to be adaptive later, but not at the time of decision, being based on immediately available environmental clues.

And a mystery built on digital clues is born.

Until recently, it was assumed that other birds rely on different clues to guide them home.