Then:
Destructive Interaction is when A & B is less than or equal to one. In such an interaction, why interact at all? There is not point to it, since you only destroy the work that the other has created.
Minor-Destructive Interaction is when A & B is greater than one but less than two. In this case, the two of you together are doing less work than you could separately, but you are doing it together. For the sake of interaction, this is a somewhat worthy form of interaction. You are more productive together than if you did the job alone. This does carry certain advantages. For instance, in a deadline is a priority, then working together like this could be productive.
Parallel Interaction is when A & B is equal to two. This means that working together you accomplish the job twice as fast, but take up twice as many workers. Since time is a good consideration, this type of interaction is great for most types of work.
Creative Interaction is when A & B is greater than two. That means that the two of you creating together does a better job than the two of you working separately. You positively help each other and the good parts of the one make up for the bad parts of the other. This is clearly the kind of interaction which people hope for.
Labels: Ken yen