-- except

People don't fit in boxes.

Let those who take time to sort
Neatly things upon discretion.
"All is this, just this," their sport,
But there's always exception.

All may be "this" that they know;
Know they not all, however.
Unlike eggs put in a row,
Judgment ought to be harder.

Violets are violet --
But not all -- for some are blue;
Chocolates are dulcet,
But bitter are kinds a few.

The list might run half a mile
If all I enumerate;
There are things you can't just file,
With care you must always rate.