How will I recognize you?

How will I recognize you?

 and How will I know you?

a question asked by one of two people who have agreed to meet for the first time in a large busy place. Tom: Okay, I'll meet you at the west door of the station. Mary: Fine. How will I recognize you? Tom: I'll be wearing dark glasses. Bill: I'll meet you at six. How will I recognize you? Mary: I'll be carrying a brown umbrella.

See also: how, recognize, will