I tell thee, Dick, where I have been.

This is literature:

And a man shall be as an hiding place from the wind, and

a covert from the tempest;

As rivers of water in a dry place,

As the shadow of a great rock in a weary land.

But so is this literature:

One circle cannot touch another circle on the outside at

more points than one.

For, if it be possible, let the circle ACK touch the circle

ABC at the points A, C. Join AC.

Then because the two points A, C are in the

circumference of the circle ACK the line which joins them

falls within that circle.

But the circle ACK is without the circle ABC. Therefore

the straight line AC is without the circle ABC.

But because the two points A, C are in the circumference of

ABC therefore the straight line AC falls within that circle.

_Which is absurd._

Therefore one circle cannot touch another on the outside at

more points than one.

On The Art of Reading · 第 63 / 132 题