A new survey finds that those of us who remember life before cell phones are more likely to remember other things as well. As people rely more on electronic devices, they're no longer memorizing simple things. A quarter of those polled say they couldn't remember their landline telephone number. Two-thirds say they couldn't remember the birthdays of more than three friends. And there is a generational element: the under-30s crowd remembered fewer dates and numbers than those over 50.