I think normally usage, that is non mathematical usage, doesn't mean what I expected, it means the middle of available options, or perhaps the most common optio

I think normally usage, that is non mathematical usage, doesn't mean what I expected, it means the middle of available options, or perhaps the most common option. When applied to quality one would expect that means there is low quality, average quality, and high quality. So I seriously don't know what this means in a legal context.