How did Guehi 'assist' allow Barry to score when offside?

Everton striker Thierno Barry scored against Manchester City on Monday in a controversial incident involving Marc Guehi, who inadvertently played the ball to Barry while the striker was in an offside position. The goal was allowed to stand due to a rule that treats a deliberate play by a defender as resetting the offside trap, raising questions about the fairness of the law. The incident prompted wider debate about several key refereeing decisions from the match.