Once a man said,
I never saw a Purple Cow;
Again he spoke,
I never hope to see one.
Then all the people said,
How noble his humble-mindedness!
How glorious his meek resignation!
Now this is the strange part--
The man has seen hundreds of purple cows,
Ay, thousands,
But the man was color blind,
And the cows seemed to him to be a reddish brown.