I'm becoming immune to marketing

Recently, because it was on special, I bought some McCain oven fries. We sometimes have chips in the freezer and usually we have the cheapest ones.

Today I cooked them as part of dinner and my partner says 'they're really crunchy'. And they were nice.

I thought about it and realised that is the marketing line they have in their TV advertising. I hate the advertisements but I knew that was their line. And then I thought 'why haven't I bought these before in that case?"

Answer - I didn't believe the advert. In fact when i sat down and thought about it - I don't believe any adverts. The only thing I believe is price, and I have some feel for brand positioning, but if McCain has an ad saying it's chips are crunchier I assume they're just saying that. Same with most other ads I see.