I think this is a really interesting metaphor to make teachers think about the idea of ‘education, noticing and knowing’.
The less educated notice the bird as black: therefore it is black. They think everyone else must see the bird as black too, otherwise they are lying.
The more educated and aware notice the bird as colourful. Perhaps they have no idea why others see the bird as black, and think that they are lying.
Does education enhance the analogical ‘frequencies we are able to notice’?
Perhaps Dunning-Krueger folks would believe the bird is definitively black for everyone because that is the limit of their personal awareness…
Incorporating this into ToK and literature could be interesting.