# grammar (10-grammar.com)

Grammar is the set of rules for how words fit together in a language so that sentences make sense. People talk about grammar when they mean correct or polished writing and speech.

## What a model may hear
- formal grammar (computer science and linguistics): expects a strict mathematical description of which strings are valid, such as context-free or regular grammars
- parser grammar (programming language design and compilers): looks for a formal specification file that defines syntax rules for parsing code
- grammar checking (natural language processing tools): assumes the user wants automated detection of errors in text, not discussion of rules
- grammar of graphics (data visualization, especially ggplot): expects layered plotting specifications mapping data to visual elements

## Where people and models part ways
- Says: "Fix the grammar in this sentence."
  Means: Make my writing sound more correct or natural.
  May be taken as: Applies rigid formal rules and overcorrects colloquial or stylistic choices that were intentional.
  Say instead: "Make this sentence sound more natural and polished, keeping my tone."
- Says: "What is the grammar of this language?"
  Means: Explain how this human language works.
  May be taken as: Generates a formal BNF or context-free grammar notation that is unreadable to the user.
  Say instead: "Explain the basic rules of how sentences work in this language, in plain terms."
- Says: "Use good grammar."
  Means: Write clearly and professionally.
  May be taken as: Interprets as a command to follow prescriptive school rules and produces stilted prose.
  Say instead: "Write in a clear, professional style that sounds natural to a general reader."
- Says: "Show me the grammar."
  Means: Teach me the rules.
  May be taken as: Outputs code in a grammar specification format like EBNF or YAML.
  Say instead: "Teach me the rules with examples, not code or symbols."

## Tips
- Say 'rules of writing' instead of 'grammar' if you want style advice, not syntax theory.
- Add 'for a human reader' when you want natural language, not formal notation.
- Specify 'programming language grammar' if you actually need parser rules.
- Say 'grammar of graphics' explicitly if you mean data visualization layers.
- Ask for 'examples, not symbols' to block formal notation output.

## Often confused with
- syntax: more technical, often means code structure not prose style
- style: broader than grammar, covers tone and word choice too
- semantics: meaning of language, not the rules for forming it
- parsing: the process of analyzing structure, not the rules themselves
- orthography: spelling and writing conventions, not sentence structure
- usage: how people actually write, not formal rule systems