Make sure the sigmoid code lines up with what the function we use is doing
Make sure below the usual formula for the Euclidean distance you give the generalized one, as it is a bit more tricky, read off the code and explain why it looks like it does.
Mention similarity scores are normalized to be between 0 and 1 on the front end no matter how many features are used an no matter what weights are used.
I have made appropriate changes