That is a really good point- I will look into that further.
I knew a guy who was so sensitive to peanuts he could tell just by walking into a room if there was peanut butter present.
BUT that is the body’s reaction to the tiny amount- not a glass of water’s ‘memory’ of having a chemical in it. I would like to see them do a homeopathic peanut butter in water test and see if a person reacts.
If you keep adding water to a solution of a chemical, a memory is not retained, the number of atoms of the chemical become fewer and fewer, but there still are a few left. That is why terms such as parts per billion are used, meaning one or more atoms of the chemical versus a billion of the water.