Telepathy is often imagined as a mind-radio, where the psychic tunes in to another's thoughts like a cold war spy at a comm intercept tower.  This is due to the influence of film and television. In reality, mind reading is a combination of skills dressed up to suit the style of the performance. Can you listen to another's thoughts? Of course not. Can you know another's thoughts without them telling you anything? Anyone who has ever been in a long term relationship will tell you that you can.

Assuming this can be done without the benefit of knowing someone, what do you suppose it would look like? 

How about I show you?