A really good author could probably make this up. Some types of writing require that ability. Imagine you're writing about a fantasy world where everyone drives giant Bloops instead of cars. You might have a few chapters written from the perspective of a master Bloop mechanic. She's been fixing Bloops for as long as she can remember; she considers it her life's calling and she loves every moment of her work. The author needs to communicate that to the reader in a believable way.

But if you're not writing speculative fiction, what would be the point? It's probably harder than writing about something you know!