- It'll have to come out.
- What?
- Your whole mouth. It's bad.
- Really?
- I can replace it with this prosthesis, but it'll cost you $20,000.
- Oh my God!
A dentist could tell me just about anything and I'd have no choice but to believe them. Picking a dentist is basically a lottery, because you don't have any way of telling if they're a good one.
I guess this is how end users must feel about IT people...