He told us he was able to cold read the man's profession.
"..., we meet someone and want to find out a little more about him/her ..., so, completely without conscious thought, we begin to cold read.
Why sceptics do not cold read? (Article heading)
At the audition you will be required to cold read a script.
Learning to Cold Read (Article heading on acting website)
This is an example of what magicians (unfortunately phony psychics) call a "cold read".