An oath is indivisible, it cannot be in part true and in part false. As scarce as the truth is, the supply is much greater than the demand. Believe those seeking the truth, doubt those who find it. Don't give them hell. Tell the truth, and they think it's hell.
Evil does seek to maintain power by suppressing the truth.
Flattery is kinder but truth gets results. Getting caught is the mother of invention. Help fight truth decay. Honesty is the best image. If you consult enough experts, you can confirm any opinion.