Dimensions

One is flat and thin, like a one dimensional line. And it has a placeholder somewhere on it.

One is flat like a plane. There is a numeric value somewhere on it.

Time is a good example. It is similar to the first dimension in my mind. You can think about the past, so you know it was there, and know there is a future, but there is only an infinitely small point for the present. This is now.  This is the only point that you can use, and you can’t manipulate other placeholders with that one (or numeric values), just like you can't combine the reality of time to understand something new.

This is how placeholders work. The only part of placeholders that are useable as a number is the one point that crosses the numeric value. A placeholder can be used on any point on the placeholder line, but it is only a concept until it crosses a NV. Then it is a number.

They can't be added up to form numeric values, but on their own they exist.

Numeric values are on a two dimensional plane. They can move around on the plane, but do not become greater or lesser then they already are.