Truth, what is the one thing I haven't asked you, that I should know about this?

Have you ever made a major purchase — a business, house, car, equipment, or an educational course or travel — only to find out as soon as you handed over the cash, you didn't receive what you thought you'd bought?

What about a job? Have you ever been in an interview, being asked 'do you have any questions?' and then asked no real question, or asked something not particularly useful?

If so, next time, ask this question to the seller or interviewer "Truth, what is the one thing I haven't asked you, that I should know about this thing/job"?

You don't know what you don't know. The only way is to ask. So ask: "What don't I know that you should tell me?" ​

Starting with the word 'truth' is a subconscious reminder that they must tell you what is true. Use it whenever you'd like to know what's really going on.