[pydry]

Definition is orthogonal to understanding.

The key question isn't "do we understand it?" but can we disprove it?

As an example, what a "country" is is well understood but not well defined. There are all sorts of examples of places that either are or are not a country depending on whose definition you use - transnistria, Nauru, Vatican, Somaliland, etc.

You could argue that passing the Turing test equates to consciousness for instance, which is fairly well defined. In which case it was achieved in 2014 (I think?).

Or not - but if it's not, what is the definition?