The cumulative case study can be retrospective, aggregating information across studies done in the past, or prospective, structuring a series of investigations for different times in the future.
Aggretating information has been done millions upon millions of times in the past. 
mnli hypothesis: Aggretating information has been done millions upon millions of times in the past.  premise: The cumulative case study can be retrospective, aggregating information across studies done in the past, or prospective, structuring a series of investigations for different times in the future.