If you are sure that your interlocutor is hiding something from you, try to find out the truth using these simple, but at the same time effective tricks.
How to make a person tell the truth
The psychological tactics on this list can get even the most secretive person to talk.
Provocative questions
If you have at least some knowledge of the information you want to know, try asking the right questions. If the provocation hits the mark, your opponent will give you full details of what you want to know so badly.
Encouragement
Promise to tell something secret in return or offer some other reward for the information provided - this will force your interlocutor to reveal everything he knows.
Playing on emotions
If a person is worried about some information but doesn't want to share it for some reason, you can try to play on their anxiety. Offer to share the information with you, promising that they will feel better after they speak out.
Praise
With the help of flattery, which works as a boost to the human ego, you can achieve what you want. Praise the intelligence or appearance of the interlocutor, and you will immediately become a kind and decent person for him, with whom it is not a sin to share secrets.