The Notes don't exist

The possibility of this theory seems slightly likely, although is probably not true.

Daisy is sure that her dad kept notes on Alan when he was creating him. She thinks that if she can find the notes, they will tell her how to take care of him, how he functions, and how he will grow. Daisy does not discover that there are other creations until she is able to explore the basement. Until that video, she believes that Alan is the one and only monster that was created by her father.

It does not make sense that her father would have much knowledge on the monster if it was his first experiment. How would he know that Alan would only be able to process sugar? How would he be able to determine how this unknown experiment grows and develops? Although he created Alan, there is no way he could have predicted that Alan would develop a personality, mobility, vocal cords, a memory, and eventually, human limbs.

Her father also does not seem trusting of others, and tries to keep his experiments private. He is not trying to make these creations because he wants others to follow the instructions and recreate his experiment. He was making these creations with a purpose, which was also kept a secret from the world, including Daisy. So why would he keep notes around? He may have burned anything he may have written, just as he burned Daisy's "inappropriate" questions. His experiments were inappropriate for Daisy. Plus, he believed his creations were disasters, and probably did not think any different of Alan. Why would he keep notes of a failed experiment lying around?

If his lab was in the basement, then how did Daisy not know anything? She says that the basement has been sealed off since she was a little girl, and she has never seen her father go downstairs. In one of the hidden captions, however, it seems like her father is working on one of her experiments and she comes in late at night. It seems unlikely he was working on his creations upstairs. If she had seen him working in his lab, she would know where his lab is, but she says she does not know where he worked. This may be a result of a plot hole or a personal misunderstanding or misinterpretation.

The reason this theory is slightly likely is because of the fact that Daisy has been looking for them for a very long time, and has had no luck. Until "the basement," was uploaded, there seemed to be no hope in finding the notes. There seemed to be no reason to find the notes because it was assumed that the notes would only hold information about what Alan is. It's too late, because we have seen what Alan has become. This leads into the next theory- that the notes are not what Daisy thought they were.