| Paragraph 1 | ALL instruction given or received by way of argument proceeds from pre-existent knowledge. |
| Paragraph 2 | The pre-existent knowledge required is of two kinds. |
| Paragraph 3 | If he did not in an unqualified sense of the term know the existence of this triangle, how could he know without qualification that its angles were equal to two right angles? |
HTML by 
created 94/10/29 modified 1998/9/3