Gettier created similar scenarios to challenge ‘justified true belief’. You are looking at a field and see what you believe is a cow. You infer that there is a cow in the field. Actually, there is a cow in the field, so the inference is true, but it can’t be seen because it is in a dip in the field. You are in possession of a true statement. It was based on a justifiable belief, and the thing you were looking at certainly looked exactly like a cow. But the fact that the statement you made is true does not imply knowledge.
