If hand labeling is so problematic, what if we don’t use hand labels altogether? One approach that has gained popularity is weak supervision. One of the most popular open source tools for weak supervision is Snorkel, developed at the Stanford AI Lab.11 The insight behind weak supervision is that people rely on heuristics, which can be developed with subject matter expertise, to label data. For example, a doctor might use the following heuristics to decide whether a patient’s case should be prioritized as emergent: If the nurse’s note mentions a serious condition like pneumonia, the patient’s
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