Great example of how ‘synergy’ differs from ‘interaction’

I think this example might be a case of a departure from an ‘inverse interaction on the additive scale’ for people who would give negative signed ratings to (1) rancid sweat, (2) cabbage, and (3) vinegar, and a positive sign on the dark chocolate. In that case, it is a  clear departure from additivity and more ‘infra-additivity’ rather than ‘supra-additivity’ (for many people). I happen to like the smell of most vinegar (positive sign on that rating), some cabbage, but not rancid sweat.

Link to article in NYTimes, May 15, 2019 (https://www.nytimes.com/by/veronique-greenwood)