[thaumasiotes]

> In fact, I can probably wander the entire Walmart store in about 30-45 minutes and see everything they are selling in that store.

I'm pretty sure this can't be done. Consider how frequent it is to intend to purchase a particular item, which you know the store stocks, and yet be unable to find it even though you're looking for it in the correct aisle.

What if we ran the following experiment:

1. We give the subject a particular item to look for. They know what they're supposed to find.

2. The subject looks through the Walmart for up to 60 minutes for that item. They can't ask for help.

3. We then ask a single question, "is this item in stock at this Walmart?"

What percentage of subjects would answer correctly?

[zamadatix]

There is a difference between seeing everything (or at least the vast majority of things) and remembering everything. Assuming that for the most part like items are clumped together it doesn't matter if you can remember if Lay's southern barbecue was in stock it matters if, when strolling down the aisle, you were able to see the majority of the chips in one place.

It's a bit like sequential read vs random read. In a physical store it's largely possible to sequentially read the inventory even if you can't quickly search for individual items randomly quickly. On Amazon you're not going to go through all of the aisles sequentially, at best you go in knowing exactly what virtual aisles you want and then you can sequentially search that and even then the best it's going to work out is the worst case of walking through the entire store for an hour.

[thaumasiotes]

You appear to be talking about something fairly different from what my comment addresses.

> it doesn't matter if you can remember if Lay's southern barbecue was in stock it matters if, when strolling down the aisle, you were able to see the majority of the chips in one place.

Perhaps, but I didn't ask about this. The challenge is that you are told in advance that you're looking for Lay's Southern Barbecue. Remembering whether it's there is not difficult, because it's the only thing you want. The difficult part is determining whether it's there.

> In a physical store it's largely possible to sequentially read the inventory even if you can't quickly search for individual items randomly quickly.

Again, this badly misunderstands what I was saying. It is not possible to sequentially read the inventory in a physical store; if this were possible, determining whether or not a particular product existed in the store would be trivial. Instead, this task is one that people routinely fail at.

[zamadatix]

We're talking about the same thing unless your stance is 100% of people known 100% of the product SKUs they want when looking for things and they know these before they start looking. For those that don't go in knowing the want exactly "Lay's Southern Barbecue 9.5 oz Bag for $2.98" your scenario quickly breaks down into the points I discussed which is why I brought them up.

In more Amazon terms someone is going to search "tablet" not "New Apple iPad Air (10.9-inch, Wi-Fi, 64GB) - Rose Gold (Latest Model, 4th Generation) sold by Apple". Even if searching "Apple iPad" I get Amazon Fire tablets high in the results.