1. Given any two real numbers on the real number line, you can find another real number between those two points.

2. The Planck length is the smallest unit of distance with any meaning.

3. The universe has finite diameter.

Discuss.

4. For extra credit: Given 2 and 3, above, it follows that both the diameter and circumference of the universe can be expressed in Planck lengths as integers with a finite number of digits. Discuss the concept that Pi is a ratio of two finite integers.