When should one call themselves an X researcher?

There are so many different types of researchers. Weather researchers, climate researchers, brain researchers. And within those categories, the nuances (like memory researchers).

When someone says they are an X researcher, what does that imply to you? In other words, what qualifies? Does it just imply that they are curious about X? Or perhaps that they know a bit more about it - perhaps they've mastered some scholarly literature or they've done at least one experiment? Or maybe even published a paper in a peer reviewed journal? Or maybe even more - perhaps they have a body of work on the topic; maybe they even run a lab (and have grants to support X research).

On one hand, no one should gate keep curiosity! On the other, certain terms imply knowledge and qualifications. I'm a "researcher". But just because I know a lot about memory doesn't automatically mean that people should listen to me about climate or economics. And I once read a very good book about ecosystems, but I don't think that means I should quality as an ecosystem researcher. So what, then, might instead?

#science