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Psychology suggests making a shopping list is a sign of sharper thinking
(economictimes.indiatimes.com)
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This feels like a broad generalization to me. I typically make many trips per week for just a few items; I don’t need a list.
Other times I might make a list because I’m buying more or I’m planning on cooking a new recipe.
I just can’t imagine someone living an hour drive from the grocery store using a big list has “sharper thinking” than someone that lives next door to it and never needs a list.