Couldn't their silence just mean they're confident in what they see?

Actually, chips are pretty bad for electrolytes since they dehydrate you. The salt makes you lose more water than you gain.

What if your brain made the right memory but stuck it in the wrong place? I read somewhere that context is huge for memory, like if you decide to get a soda while you're unloading groceries, your brain might file that memory with "kitchen stuff" instead of "drink choice." So later, you're sure you bought cola because you remember the decision, but your memory of actually picking it up is fuzzy or attached to the wrong event. Your hands might have just grabbed root beer while your mind was on putting away the milk. That would make you sure you got cola, even though you didn't.

Started writing it down, weirdly helps.

That image is basically the whole point. Take it away and the design falls apart.