We'll just do a nominal flight check.

The structural distinctiveness of the cell—in plants especially—is dues in large part to the presence of an outer layer, or coat, the cell wall, which in plants is usually firm, and often hard and thick; in animals, delicate or lacking.

Is this some kind of reference to Catholic guilt, or merely a snatch of surreal Milliganesque nonsense?

Trafford Publishing, Origin: The Heritage Files - Phase One, Roger Hydes, 2008, →ISBN