Just like the clown....can't tell what is sense and what nonsense. Nature always errs on the side of caution. We fear the dark, without reason because we err on the side of caution. So, does the clown of ILP. He can't differentiate sense from nonsense, so he calls it all nonsense.
In the last scene one clown asks: What kind of tree is it? Willow the other clown answers.