"It's a controversial and complicated idea. " It is neither controversial nor complicated to detect some cancers by scent. Taking the "headspace" of something

"It's a controversial and complicated idea. " It is neither controversial nor complicated to detect some cancers by scent. Taking the "headspace" of something is also not really complicated. There are people who can reliably smell/detect Parkinson: https://www.npr.org/sections/health-shots/2020/03/23/820274501/her-incredible-sense-of-smell-is-helping-scientists-find-new-ways-to-diagnose-di https://www.npr.org/sections/health-shots/2020/03/23/8202745...