Gestalt

Gestalt's law of perception would predicts that people have difficulty understanding this signage. The principle of proximity would 'force' people to group the two separate elements together to be perceived as one unit of information. Therefore, people looking for the toilet would do a double take at this sign. Is it for a toilet, or a seminar room?

In fact, there were at least two women who were confused with this sign. I witnessed their confusion, and fully sympatise.