What is a Markov Decision Process in RL?

MDP frames any RL problem: states, actions, transitions, rewards, discount. It's the blueprint before algorithms kick in.

How does the Bellman equation work?

It recurses value: current reward plus discounted future value. Powers backup in Q-learning, letting agents learn from delayed wins.

Is reinforcement learning better than supervised ML?

Better for sequential decisions in unknown worlds. Worse for everything else—data-hungry, unstable. Pick your poison.

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Reinforcement Learning's Dirty Secret: It's Not Your Grandma's Machine Learning

In 2016, AlphaGo stunned the world by mastering Go via reinforcement learning—no datasets, just raw trial-and-error. But 8 years later, why do most RL projects crash and burn?

theAIcatchup Apr 10, 2026 3 min read

Mental map diagram of Reinforcement Learning concepts: MDP components, Bellman equation, and RL vs ML comparison

⚡ Key Takeaways

RL flips ML's script: no labels, just trial-error in reactive worlds. 𝕏
MDP and Bellman equation are the unskippable foundations—ignore at peril. 𝕏
Hype outpaces reality; pure RL struggles beyond games without hybrids. 𝕏

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#Bellman equation #MDP #RL #machine-learning #reinforcement learning

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