There has got to be something misleading about that factoid. I mean don't get me wrong, I'm quick to believe that half of humans are completely idiotic. But for roughly half of people to not know the potato chips are made out of potatoes? What did they think they were made out of then? Hopes and dreams? Surely it was really something more like, they didn't know it was made entirely with potatoes and not some sort of starch additives, or they didn't know that it was totally natural (but it isn't so idk)....

I just can't believe that 42% of people didn't know that Lays are made of potatoes.

Edit: Indeed, the "source" is their marketing blog, which cites no study or methodology: https://www.pepsico.com/our-stories/story/from-potato-to-chip-the-next-chapter-of-lays

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SILENCE, BRAND