Cratylus

Rachel Barney has written:

'Names and nature in Plato's Cratylus' -- subject(s): Language and languages, Names, Naturalness (Linguistics), Philosophy

Michael D. Palmer has written:

'The Wiley-Blackwell companion to religion and social justice' -- subject(s): Religious aspects, Social justice

'Names, reference, and correctness in Plato's Cratylus' -- subject(s): Language and languages, Names, Philosophy, Reference (Philosophy)

a high school diploma Apuleius informs us that Speusippus praised Plato's quickness of mind and modesty as a boy, and the "first fruits of his youth infused with hard work and love of study".[20] Plato must have been instructed in grammar, music, and gymnastics by the most distinguished teachers of his time.[21] Dicaearchus went so far as to say that Plato wrestled at the Isthmian games.[22] Plato had also attended courses of philosophy; before meeting Socrates, he first became acquainted with Cratylus (a disciple of Heraclitus, a prominent pre-Socratic Greek philosopher) and the Heraclitean doctrines.[23]

The origins of sign language are not definitively known, but early forms of manual communication likely existed since antiquity as a way for deaf individuals to communicate. Sign language as we recognize it today began to be formalized in the early 19th century, with major contributions from individuals like Laurent Clerc and Thomas Gallaudet.