> Even for those it doesn't ruin, outsourcing your thinking is a poor way to get smarter. How many phone numbers do you know in your head versus when you were

> Even for those it doesn't ruin, outsourcing your thinking is a poor way to get smarter. How many phone numbers do you know in your head versus when you were younger? I know three phone numbers from memory - my wife’s, my mom’s (she has had the same phone number since I was born) and an aunt that lives at my grandparents house since they passed and she has the same phone number. When you go to a new city, do you try to find your way around like you use to or do you use GPS?