In Plato's "Parmenides" at one stage inclusion is casually used as a reflexive property to argue that the 'One' (everything that is) must be included in itself. Parmenides in the text even keeps going to make this argument geometric and talks abou the number of contacts of nested forms etc.
- In Greek thought what are the arguments for or uses of properties or objects as included in themselves?
- Are there modern thinkers that use this notion in a positive (synthetic) way?
- Can you think of physical objects that are contained in themselves?