Your wisdom is just hindsight with a smug expression.

Here is the unpleasant truth you have been dressing up as insight: your so-called wisdom is nothing more than yesterday's mistakes wearing a clean shirt. You did not predict anything. You blundered into the obvious, watched it unfold with the helplessness of a damp towel, and then turned round to present your bruises as foresight. That smug little expression is the giveaway. It is the look of someone who has mistaken the ability to describe a disaster after it has happened for the talent to prevent it. Anyone can be wise with the benefit of a ruined outcome and a fresh cup of tea. The genuinely clever ones speak before the damage and take the risk of being wrong. You wait until the evidence is safely stacked, the witnesses have gone, and the humiliation has settled, then announce that you saw it coming all along. It lands hardest when you are being congratulated for your judgement by someone who has not yet noticed that you are simply reading yesterday's newspaper aloud. Your wisdom is hindsight with a smug expression, and the expression is doing all the heavy lifting.