Drunk-driving Memes

Someone really took "know your limits" to a whole new level here. The shirt shows a function that's clearly having an identity crisis around x=0—approaching from the left gives you one value, from the right gives you something completely different. It's a discontinuity so dramatic it makes your average breakup look smooth. For those who blocked out calculus: when a function jumps around like this at a point, the limit literally doesn't exist there. You can't pin down where it's going because it's going two different places at once. Kind of like trying to predict where you'll end up after a few drinks, which is exactly why this makes the perfect drunk driving PSA for math nerds. Props to whoever designed this—it's simultaneously educational, responsible, and nerdy enough to make you the hit of any calculus department party. Which, let's be honest, isn't setting the bar very high.