you don't have to be a rocket scientist

you don't have to be a rocket scientist (to do something)

One doesn't have to be particularly intelligent to be able to do or understand something. You don't have to be a rocket scientist to learn how to change the oil in your car. You don't have to be a rocket scientist to know that you have to unplug electrical equipment before you try to fix them.
See also: have, rocket, scientist

you don’t have to be a ˈrocket scientist (to do something)

,

it doesn’t take a ˈrocket scientist (to do something)

used to emphasize that something is easy to understand: Of course this model sells more than the others — it’s the cheapest! It doesn’t take a rocket scientist to work that one out.
See also: have, rocket, scientist
References in periodicals archive ?
You don't have to be a rocket scientist to be an international striker-turnedmanager-turned-Sky pundit, but with a degree in aeronautical engineering from the University of Herts, Iain Dowie fits the bill nicely.
You don't have to be a rocket scientist or biologist to get to the level of an informed amateur," Wheeler says.
If Cardiff can get crowds of 17,000 to 18,000 in the Second Division, you don't have to be a rocket scientist to see if you add good African players to good Welsh players at Barry Town the supporters are there.
You don't have to be a rocket scientist to understand the physics underlying solar sails.
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