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Gilad Drori's avatar

An excellent account of this subject, thank you.

One point of interest is the "exact" definition, or dependency, of identities to be the sum of their parts. How I see it, is that we recognise and categorise objects as identities by sets of their properties, yes, but these mental definitions do not require a "complete set" of properties to serve us.

So, a fruitless, leafless, branchless, barkless and rootless thing is obviously not a tree. Start adding some tree properties though, and at a certain point it is a tree, allegedly. That point, which supposedly would be the exact definition of a minimal tree, cannot be found.

Why is that? Is it because our pattern recognition capabilities are more advanced than we are able to articulate? If we define 'tree' as 'anything we recognise as a tree' then we make no progress with defining it. Yet we humans still learn how to recognise trees. That leads me to believe that recognition and categorisation are processes that, for whatever reason, we ultimately can't understand completely.

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