Okay, so how reproducible is this? Because I've seen many cases of single-primate case studies that turned out to be not reproducible as others attempted to do

Okay, so how reproducible is this? Because I've seen many cases of single-primate case studies that turned out to be not reproducible as others attempted to do it, — in particular those that found human-like behavior in nonhuman primates. It feels as though every researcher that wants to find human-like behavior in non-human primates can find it, and every research that desires that it isn't there can find it's nonexistence.