Note 52 — Chapter XII

It is quite true, that in all qualities involving sensation, there may be a doubt whether different people receive the same sensation from the same thing (compare Part II. Sec. I. Chap. V. § 6.); but, though this makes such facts not distinctly explicable, it does not alter the facts themselves. I derive a certain sensation, which I call sweetness, from sugar. That is a fact. Another person feels a sensation, which he also calls sweetness, from sugar. That is also a fact. The sugar's power to produce these two sensations, which we suppose to be, and which are, in all probability, very nearly the same in both of us, and, on the whole, in the human race, is its sweetness.