Common sense is supposed to be "common." That means everyone should have it. Unfortunately, that's far from the truth. There are plenty of people who just don't follow the basic rules of life. Here are a few pieces of common sense knowledge that most people don't actually understand:
1. You Shouldn't Take up an Entire Hallway
If you've ever been to the city, or just in a crowded school, you'll know how frustrating this can be. Even though it should be common sense to walk fast when there are people behind you, or at least step to the side so that they can go around you, nobody does it. That's why you're always stuck walking at a snail's pace behind a group of friends that doesn't realize there are other people in the world.