Below is the quote I mentioned yesterday.
“A basic rule is to fill your reports with ‘maybe’ ‘perhaps’ and ‘possibly’. This enables you to make an orderly and dignified retreat in case of attack.
Another way to sidestep criticism is to make your prose so obscure and tortuous that nobody is quite sure what you are saying. If later proved wrong , this smokescreen will enable you to claim that you were misunderstood and that you actually said nothing of the kind.” Pa.