Take the following as truth: Backfill Techniques Techniques used in cumulative case studies to collect information needed if the study is to be usable for aggregation; these techniques include, for example, obtaining missing information from the authors on how instances studied were identified and on the bases for instance selection.
Then the following statement: "Case studies performed by different researches using different techniques cannot be compared or combined to reach useful conclusions. " is true, false, or inconclusive?
Answer: False