I agree that it's subjective.
For me I would still add beer to my chili and not think twice about it. That may be a no no for someone else.
The only thing that would trigger me would be ingesting something that had the ability to trip the off switch in my brain that I've worked so hard to disable. For instance, I've never thought of drinking mouthwash to achieve an effect so it wouldn't bother me to use it if it had alcohol in it. I wouldn't eat a chocolate though if it had alcohol within that could possibly result in creating even a minute buzz.
It's not about the liquid for me, it's about the feeling. If there's no possibility of the spark there's no fire.