## An Unusual Walk

Imagine a stretch of sidewalk that is precisely 6 feet long. An initial 3 foot step is taken. Every step after that must be 1/2 the distance of the previous step. So our second step is 1/2 the length of the first step. The third step is 1/2 the length of the second step, and so on.**Questions:**

1. Theoretically, how long would it take you to reach the end of the 6′stretch?

2. How far would you have traveled, after each step?

**Answers:**

1. You would, again theoretically, never make it to the end.

2. After 1 step, you’ve traveled 3′; after 2 steps, 4.5′. By the third step, you’ve traveled 5.25′, by the fourth, 5.625′. After 5 steps, you’ve traveled 5.8125′, and on, indefinitely.

## The Real World

Consider once again our 6′ sidewalk and our 3′. This time,*every*step is set at 3′. I hear you saying, “The traveler reaches the end in two steps.” And you would be correct, even from a mathematician’s perspective. But stop and think… To achieve the second step, the traveler lifts his foot and move it forward. In the process of moving that foot, wouldn’t it pass the 4.5′ mark, the 5.25′ mark, the 5.625′ mark, and the 5.8125′ mark?

How is it you actually succeed in reaching the 6′ mark? Is it because mathematical points do not actually exist in the real world? Mathematics is a supremely useful tool. But is it not also a product of our imagination? In all fairness, I would suggest Mathematics is both. It should not be taken

*too*seriously.

## Mathematics Intrinsic Value?

I compare mathematics with the alphabet. Communication is thought transference. The simplest form of thought transference is spoken language. Now spoken language¹ consists of combinations of basic sounds called phonemes (watch video).The alphabet enables words to be put into written form. The alphabet possesses no intrinsic value. Certainly it is a useful tool. It is also artificial. Something similar might be said of mathematics.

¹ For obvious reason, we do not include sign-language.

Note: You might also enjoy Is a Circle a Polygon or Not? Implications for Calculus

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I first heard of Xeno’s paradox in school and found it most intriguing.