[YC Co-founder Paul Graham: Twitter/X Strengthens AI Reply Filtering] Y Combinator co-founder Paul Graham posted that Twitter has recently marked a large number of suspected AI-generated replies as 'potential spam.' In one of his tweets, 59 replies were received, with 34 of them hidden, mostly for this reason. He predicts that this proportion will continue to rise, and in the future, most replies may be collapsed by default.