I mean, it is a very reasonable concern. Upon hearing Helen’s story, it’s very easy to see how it might have been a Clever Hans situation. At surface level, Helen Keller’s story sound a lot like Clever Hans.

The difference between the two is that Keller’s claims actually stood up to scrutiny. Hans could never perform his feats in independent and controlled testing. Keller was able to function and communicate independently with people for decades. But if they are not aware of this history, I can see why people are skeptical.