I understand that it can be an interesting mental exercise. I'm just objecting to the underlying assumption that "be" makes sentences inherently unclear or sub

I understand that it can be an interesting mental exercise. I'm just objecting to the underlying assumption that "be" makes sentences inherently unclear or subjective. For exercise, you could instead have excluded, say, every five-letter word, but (hopefully) nobody will claim that five-letter words make English unclear. It seems to me that E-prime works only because "be" is so common that you're forced to rewrite almost every sentence, yet it carries so little "semantic weight" that all such sentences can be rewritten with a bit of practice.