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to "verify" is to prove that something is true or correct. We can talk about different methods of verification, for example, by doing an experiment, or by checking mathematical or logical formulations.

see the course "speech acts:"


(adj.) things that are related to seeing. We talk about "visual aids", things you can show like pictures or diagrams to help people understand what you are saying.

Course CS50 introduction to computer science:

"Scratch is a visual programming environment"


adj. describes something from a volcano - a mountain that lets out hot liquid rock, sometimes with explosive force.

Course "5500 BC The first city" -