Suppose According to a recent study published in the Journal of Nutrition, researchers have found a correlation between the consumption of leafy green vegetables and improved cognitive function in older adults. The study, which followed a group of participants over a five-year period, suggests that incorporating spinach, kale, and other leafy greens into one's diet may help prevent cognitive decline associated with aging.
Can we infer that "Eating leafy green vegetables has no impact on cognitive function."? Yes, no, or maybe?