The Sheffield study was inspired by Fisher's early experiment. I don't think a single study performed in 1935 with a single participant provides indisputable pr

The Sheffield study was inspired by Fisher's early experiment. I don't think a single study performed in 1935 with a single participant provides indisputable proof though, especially given that a later study with 94 participants and more rigorous statistical and experimental methods found no clear difference. It's hard to guess now what factors lead to the lady correctly guessing all 8 cups - perhaps the experiment was poorly designed, perhaps she had exceptional tasting skills, or perhaps it was truly chance (1 in 70 isn't actually exceptionally low odds).