Recognition caution
It’s not rocket science.
Meaning
The speaker thinks something is not especially difficult or does not require advanced expertise.
Tone & use
Informal and potentially dismissive. Use a specific explanation instead when teaching, correcting, or reassuring someone.
Example
“The setup is not rocket science: connect the cable, open the app, and follow the prompts.”
Avoid using the phrase to shame someone for not knowing how to do something.