Keltham reminds himself once again that these people are not actually six-year-olds; they have any prior mathematics education, it's just been about spellforms rather than the entire rest of Reality.

"I claim that this condition is exactly equivalent to saying that every fruit in the system other than cherries must have a consistent unchanging price in cherries, and we accept trades whenever the trades are favorable according to those prices, and reject them otherwise.  Do you believe me?"

Keltham reminds himself once again that these people are not actually six-year-olds; they have any prior mathematics education, it's just been about spellforms rather than the entire rest of Reality.

"Ah, well, in that case, I claim that your condition is exactly equivalent to saying that every fruit in the system other than cherries must have a consistent unchanging price in cherries, and we accept trades whenever the trades are favorable according to those prices, and reject them otherwise.  Do you believe me?"