Understanding Necessary and Sufficient Causes in Science and Medicine
What does it mean to say that “A causes B?” If you think about it, it’s not so simple. Scientists, however, need to be a little clearer. Ghislain & Marie David / de Lossy Cultura / Getty Imagse They need to know if exposure to a toxin always makes people sick or only sometimes. They need to understand if a nasty symptom can be triggered by one virus or several....