Quantity

Quantity is an irreducible attribute of existents, and therefore it admits only an ostensive definition.

When one says that there is more or as much or less of A than there is of B, he is comparing the quantity of A to the quantity of B.

We observe that quantity comes in two forms: there are quantities which are discrete, and quantities which are continuous.

Numbers are concepts that measure quantity.

Discrete quantities are measured by natural numbers. Continuous quantities are measured by fractions (fractional numbers).