Q: What do you do for a living?

A: I'm a metrologist

Q: So, what's the weather like?

A: Uh?

Q: You said you are a meteorologist, isn't it? So, is it going to rain?

A: Hey, no, wait... I said I'm a metrologist: I measure things, no weather forecast.

Q: Why do you measure things?

A: Because things need to be measured, from time to time.

Q: What kind of things do you measure?

A: Mm, well, mm... maybe it's going to rain, after all.