The Kyriai Doxai are forty sentences, deliberately short, and Epicurus instructed students to memorise the summaries before they could argue for them — doctrine as a portable object rather than a conclusion. Most of the rest was lost, until the Villa of the Papyri at Herculaneum turned up a working Epicurean library carbonised by Vesuvius in 79 CE, much of it by Philodemus of Gadara. Since 2023 the Vesuvius Challenge has been reading those scrolls by scanning and machine learning without unrolling them; roughly forty-five scrolls and fragments have been scanned, and in 2026 PHerc. 1667 became the first to be virtually unwrapped and read end to end. It is the only case on this site of a tradition's scripture growing in the present tense.