Q: "If a man born blind can feel the differences between shapes such as spheres and cubes, could he, if his sight was restored, distinguish those objects by sight (without touching them)?"
— McKinley Valentine (@mckinleaf) March 2, 2022
This is Molyneux's Problem: a thought experiment from 1688. In 2003 it was solved: pic.twitter.com/kMaYndYvoC