W4 circuit theory XOR example

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
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I really don’t get the point here. Anyone can help? Thanks!

I doubt it’s legitimate to use XOR as the node/function in the deeper network to illustrate the point. If XOR is allowed, I guess one can just also use it as the single output unit in a one layer network and doesn’t really need the 2^n - 1 hidden units in that sense?

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It’s really not a big deal. Kind of a throwaway basically, just showing why nobody does things that way. Here’s an earlier thread that discusses this in a bit more detail.