Are there truths that are neither tautological (mathematical) nor empirical? I would suggest those statements are only meaningful if in principle we could measure the weight of a faerie.

As another example, I suggest that “Every idea weighs more than 10kg” and “Every idea weighs 10kg or less” are both not meaningful, because it is not possible to measure the weight of a given idea.

And so consider a claim like, “Consciousness has property X”, how can I decide whether or not such a claim is true?

edit: That last claim should have been, “Some other person’s consciousness has property X”.