Actually this example highlights it well.
It may well be the case that you order that, and I ask you “oh you didn’t want the spare ribs?” and you decide to add them to your order, because you didn’t notice or think about that option and it seems a good choice to you.
That’s analogous to the infinite things you didn’t think about prior to getting out of bed. You didn’t decide against them, implicitly or explicitly. You simply didn’t think about them.