You can measure "pencilness" a number of ways depending on how you operationalize the term. It could be a measure of how well it achieves the function of a pencil, how well it matches the collective understanding of the form of a pencil, how closely it materially relates to an existing reference pencil.
These are all proxy measures, but all of science is done by proxy.
Well sure, but you’re putting “pencilness” onto the collection of heterogeneous matter, same with any other level of analysis. Consciousness isn’t debatable by the thing doing it, it’s an irrepressible fact of existence to the conscious thing. Science needs a falsifiable hypothesis for the “why” of the material->consciousness transition, and constructing such a hypothesis is difficult for a lot of reasons. Saying “it emerges from neuron connections” just doesn’t capture the issue. Why should neuron connections produce this observer thing when we seem to see machines do similar things without it? Is a sufficiently large recurrent neural network conscious by the same process? If not or if so, then why? What precisely produces the phenomenon. Emergence is an observation, not a hypothesis for why that observation occurred. It could just be a trick of the light.
Agreed, I was just commenting that one can measure "penciliness". I see a lot of pedantic arguments against measurement by proxy, as if every single measurement we do wasn't by proxy.
These are all proxy measures, but all of science is done by proxy.