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## Mathematics – Grade Seven, 1961

## Three statements by Aristotle: Categoriae

## 1. We may categorize things

## 2. There is a difference between a category and what is being categorized

## 3. No category may be a category of itself or great evil will ensue

## - 350 BC

### Notes:

Always good to begin with Aristotle. This is prior to the establishment of the Axioms by Euclid.

My first mathematics textbook was The Elements by Euclid and I had to pretty well memorize it in grade four.

The axioms of Euclid are based on the work and thinking of Aristotle.