# #artificial-intelligence-lexicon > 4 public memos tagged #artificial-intelligence-lexicon on MythOS. ## Links - [Tag Page](https://mythos.one/tag/artificial-intelligence-lexicon) - [MCP Server](https://mythos.one/api/mcp) ## Memos - [Prompt Injection](https://mythos.one/me/brianswichkow/d0a288): Prompt Injection refers to a security vulnerability in Large Language Model (LLM)s where malicious or adversarial input is crafted to manipulate the model’s behavior. This can involve overriding... - [Hierarchical Reasoning Model (HRM)](https://mythos.one/me/brianswichkow/c70c64): The Hierarchical Reasoning Model (HRM) is a recurrent neural architecture proposed to address limitations in reasoning exhibited by large language models. Unlike Chain of Thought Reasoning, which... - [Hierarchal Reasoning](https://mythos.one/me/brianswichkow/c3ff24): Hierarchal reasoning is a brain-inspired approach to Artificial Intelligence (AI) in which Large Language Model (LLM)s process information across multiple levels of abstraction and timescales. This... - [Chain of Thought Reasoning](https://mythos.one/me/brianswichkow/8c60ea): Chain of thought reasoning is a method in Artificial Intelligence (AI) and cognitive science that involves articulating intermediate steps between a problem and its solution. Chain of thought...