If you give one person rare substance X and that person dies 40 minutes later, it's enough. P < 0.000001 or at least, because people dying in 40 min time period

If you give one person rare substance X and that person dies 40 minutes later, it's enough. P < 0.000001 or at least, because people dying in 40 min time period for unrelated reason is really rare. This study was an experiment (P<0.0001) that directly observed blood coagulation markers. Drink -> coagulation.