Six Essential AI Concepts Explained in Human Terms

Modern AI is full of terms that are often used without clear explanations. This guide breaks down six essential AI concepts using a simple human analogy: the brain, schooling, updated knowledge, hands and feet, a nervous system, and guiding principles.

■ Core Intelligence
- Large language models as the brain of AI systems
- Model training and tuning as sending the model to school

■ Knowledge and Action
- Retrieval-Augmented Generation (RAG) for grounding AI with external knowledge
- AI agents and tools that give the model hands and feet
- Model Context Protocol (MCP) as the central nervous system connecting models to tools

■ Safety and Guidance
- System prompts as the guiding principles that constrain AI behavior

This is a starting point for anyone who wants a clear, non-technical understanding of how modern AI systems work and what terms like LLM, RAG, agents, MCP, and system prompts actually mean.