@neonsnake I'm not an expert, or even moderately skilled in the areas but have been to a course...
Neural networks have "weights" been neurons and the different methods have different ways of determining the weights. The undirected nets are basically self guided with a set of inputs and known outputs. The computer figures out based on probability. This is how a computer knows if the photo is a dog or a cat etc, or if cells are cancerous or normal.
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