This hateful meme results from a desire to perceive people with disabilities as less than human. The "evidence" you suggest doesn't withstand a moment's scrutiny. I learned ASL in my youth and have had a few opportunities to chat with deaf blind people. To me, it should come as no surprise that they have quite unique insights about the world, and that they're often quite prolific communicators. It seems that a person would only resort to this "fraud" conclusion if they are unaware of the capabilities of the human mind, unfamiliar with the rich source of information from their largest sensory organ: their skin. Awake, human, and perceive your world.

> There was no output to speak of after Anne Sullivan died.

It looks like she wrote several books after 1936, including one about Anne Sullivan.

Interesting question. I had a look at Wikipedia and quickly dispelled the thought:

Sullivan died in 1936. Keller went on to write several books after her death:

Let us have faith (1940), Doubleday, & Doran & co., inc. Teacher: Anne Sullivan Macy: a tribute by the foster-child of her mind. (1955), Doubleday (publisher) The open door (1957), Doubleday, 140pp The faith of Helen Keller (1967) Helen Keller: her socialist years, writings and speeches (1967)

I have heard this theory before, as well.