No, I explained what a saddle point is and how a saddle point can be misidentified as a local or absolute maxima or minima if all you do is look for a point where the slope is 0.

… anyway, is this a glitch on my end or … how do most of your comments have 0 upvotes… and also 0 downvotes?

… I thought lemmy automatically gives every post 1 upvote by default.