There are problems with this beyond the obvious mathematical equation.
Late-night drunken messages could be a thing of the past.
A new feature launched today called Mail Goggles will let Google email users reduce the risk of emailing angry or emotional missives that they may later regret.
When sending an email, Mail Goggles throws up five simple maths problems on the screen.
You can choose beforehand how much time it would take you to solve the problems, presumably sober.
Drunken emailing was never my issue. Put this baby on my cellphone to text-block and you have a sale.