* Sign languages are not a single, unified language: There are hundreds of different sign languages around the world, each with its own history and development.
* Sign languages developed organically: Unlike spoken languages, which often have a clear origin point (like a specific region or group of people), sign languages evolved naturally within deaf communities.
* Limited historical records: Written documentation about the early development of sign languages is scarce.
What we *do* know:
* Sign languages have existed for centuries: We have evidence of sign language use going back hundreds of years, particularly in deaf communities.
* Sign languages have evolved over time: Like spoken languages, sign languages have changed and adapted throughout history.
Instead of focusing on a single date, it's more accurate to understand that sign languages have been around for a long time and continue to evolve as living languages.