Distinguish an observation from an inference.
An observation records what you saw. An inference proposes an explanation. “The keyboard suggested my next word” is an observation; “it read my private thoughts” is an unsupported inference. A careful diary records uncertainty and avoids collecting personal messages or identifying details.
Notebook: write your corrected or unresolved conclusion, the evidence you actually checked, and a reflection. Do not include passwords, identity documents or private information. Original BrainCheck companion content, BCAI-v1.