Dynamic epistemic logic

Dynamic epistemic logic is like playing a game with your friends where you learn new things as the game goes on and you adjust your thinking based on what you learn. Imagine you and your friends are playing a game of "Guess Who?" where you have to guess which character the other person has chosen.

At first, you don't know anything about who they chose, so you have to guess randomly. But as the game goes on and you ask questions like "Does your character have glasses?" or "Is your character a boy?", you start to learn more and more about who their character might be.

In dynamic epistemic logic, we use symbols and rules to represent this kind of learning and reasoning. We use symbols like "K" to represent knowledge (like when you "know" something about the character your friend chose) and symbols like "M" to represent actions (like when you ask a question in the game).

As we play the game and ask more questions, our knowledge (represented by the "K" symbol) changes and we can update our beliefs based on what we learn.

Dynamic epistemic logic helps us understand how our beliefs and knowledge change over time as we learn new things and take actions based on what we learn. It's like playing a game of "Guess Who?" with rules and symbols!