 But Hume does not stop there: he offers a sceptical solution to this challenge (Demeter 2019a). First he offers an individual remedy for the mathematician: to go back and to check again his reasoning, because “[e]very time he runs over his proofs, his confidence increases” (THN 1.2.4.23). Secondly, social processes are more effective in reducing doubt, because his certainty is increased “still more by the approbation of his friends; and is rais’d to its utmost perfection by the universal assent and applauses of the learned world” (THN 1.4.1.2). Even if all demonstrative knowledge remains probabilistic in this approach too, the certainty of mathematical reasoning reaches its peak due to the acknowledgment of epistemic peers.