How’s this for a stupid study: Researchers at Eotvos Lorand University in Budapest, Hungary, set out to discover the criteria people use when determining that a particular behavior is, well, stupid, Live Science reports. It turns out it doesn’t exactly take a rocket scientist: Judging whether something is stupid “comes instantaneously,” researcher Aczél Balázs says. “If one person calls something stupid, there’s a high likelihood others will do the same thing.” In fact, the rate of agreement was 90%, the Huffington Post notes. Researchers found that behaviors deemed stupid stem from three primary conditions:

-Overconfidence: You thought you could, but you couldn’t.
– Lack of control: You knew you shouldn’t, but you did.
– Absent-mindedness: You weren’t paying attention.

In the study, researchers gathered online anecdotes describing behaviors that had been called stupid. They asked 154 students to read them and determine if they were, indeed, stupid. Then, the students chose reasons why a behavior was stupid from a list.