trouble with the car

Wife: "There's trouble with the car. It has water in the carburettor."
Husband: "Water in the carburettor? That's ridiculous."
Wife: "I tell you the car has water in the carburettor."
Husband: "You don't even know what a carburettor is. I'll check it out. Where's the car?"
Wife: In the pool

A carburettor
Even
To check sth out
A pool

detective work

Sherlock Holmes and Dr Watson were going camping. They pitched their tent under the stars and were soon asleep.

Sometime in the middle of the night Holmes woke Watson up and said: "Watson, look up at the stars, and tell me what you see."

Watson replied: "I see millions and millions of stars."

Holmes said: "And what do you deduce from it?"

Watson replied: "Well, if there are millions of stars, and if even a few of those have planets, it's quite likely there are some planets like our planet out there. And if there are a few planets like Earth out there, there might also be life."

Holmes said: "Watson, you idiot, it means that somebody stole our tent."

To pitch a tent
Sometime
To deduce sth from another
Likely