As transparent attempts to evade the question go, that was pretty transparent. Common usage doesn't mean anything? You started by saying the word poison doesn't have a rigorous definition, now you're telling us common usage is irrelevant. Shall we just redefine 'poison' to mean 'cabbage stew', and be done with it?
My position has been entirely consistent.
Medicines are frequently poisons. Almonds contain poisons.
Please try to keep up.
What is the difference between the status as poisons of bleach and nicotine base liquid?
Just answer the question.
I have. The term poison is meaningless without regard to dose.
Please read:
The Dose Makes the Poison: A Plain-Language Guide to Toxicology, 3rd Edition: Patricia Frank, M. Alice Ottoboni: 9780470381120: Amazon.com: Books
You might learn something. Although, based on what you have written here, I don't have high hopes for you.