Yes, go ahead and mark unobserved symptoms. We anticipate that the diseases concept marking will give us somewhat noisy data, and hope to build additional features that will help clean up the data later on. For now, let's focus on getting that somewhat noisy data!
A FANDOM User
Should we include the word "unobserved", "not able", "absent", "could", "do not" in the marked disease concept?
not able to walk alone could read could communicate with simple hand signs do not menstruate