One of them is that with a lot of different salad dressings to choose from, if you buy one, and it's not perfect — and what salad dressing is? — it's easy to imagine you could have made a different choice that would have been better.
Una de ellas es que con tantos tipos diferentes de aderezos para elegir, si compras uno y no es perfecto y, bueno ¿cuál aderezo lo es? Es fácil imaginar que pudiste haber realizado una elección diferente que hubiese sido mejor.