In a recent legal case, Company A filed a lawsuit against Company B, alleging that Company B's new advertising campaign unfairly misleads customers about the effectiveness of Company A's product. Company A claims that their product's superior ability to solve problem X is well-documented in scientific studies, while Company B's campaign suggests that its product is equally effective despite lacking similar backing. If Company A is to succeed in its lawsuit, which of the following pieces of information would be necessary to establish that Company B's claims are false?