So if I get it right: Say you have elementary concepts A, B and C. Combinations of these concepts also give something, e.g. AB, AC, etc. You have tried and exh

So if I get it right: Say you have elementary concepts A, B and C. Combinations of these concepts also give something, e.g. AB, AC, etc. You have tried and exhausted all possible (and sensible) duplets, triples, etc. and now you are bored. Then something new comes along, D. Now you not only have a new elementary concept, but a whole lot of new possible combinations with previously known elementary concepts: AD, BD, etc.