You squeeze an avocado at the supermarket. It feels both firm and squishy. You think to yourself: “Why, yes! This is a perfect avocado ready for my award-winning guacamole.” Then you return home, slice the avocado open and discover to your horror that this seemingly fully ripe avocado is, in fact, not. Your guacamole…
Source: LifeHacker – The one place on the avocado to squeeze to tell whether it’s fully ripe