5. If all names were definable, it would be a process in infinitum.
I will not here trouble myself to prove that all
terms are not definable, from that progress in infinitum, which it will visibly lead us into, if we should allow that
all names could be defined. For, if the terms of one definition were still to be defined by another, where at last
should we stop? But I shall, from the nature of our ideas, and the signification of our words, show why some
names can, and others cannot be defined; and which they are.
