# but (9-but.us)

People say "but" to introduce a contrast or exception. They want to soften a refusal, add a caveat, or pivot to a different idea.

## What a model may hear
- bitwise XOR (C, C++, and similar programming languages): interpret the word as the ^ operator or related boolean logic, altering how it processes conditions
- BUT instruction (assembly language and low-level systems programming): treat it as a branch or block operation, potentially changing execution flow
- logical negation with exception (formal logic and proof assistants): restructure propositions as A ∧ ¬B or similar formalisms, losing conversational nuance
- string literal (natural language processing tokenization): flag it as a discourse marker or contrastive conjunction for sentiment or coherence analysis

## Where people and models part ways
- Says: "I want this but cheaper"
  Means: the person still wants the item, just at a lower price
  May be taken as: the model may treat the request as canceled or contradictory, or filter for XOR-like exclusive options
  Say instead: "I want this. Can you find a lower price?"
- Says: "It works but it's slow"
  Means: functionality is acceptable, performance needs improvement
  May be taken as: the model may interpret as a bug report or complete failure, prioritizing debugging over optimization
  Say instead: "It functions correctly. Please suggest ways to improve the speed."
- Says: "Everyone but me"
  Means: an exception for one person
  May be taken as: the model may apply set difference operations literally, excluding the wrong elements or misidentifying the scope
  Say instead: "Include everyone except me."
- Says: "But why?"
  Means: a request for deeper explanation
  May be taken as: the model may treat it as a rhetorical question or ignore it as filler, not answering
  Say instead: "Please explain the reason."

## Tips
- Put the contrast in separate sentences rather than one clause joined by 'but'
- State what you want positively first, then add constraints
- Avoid starting instructions with 'but' since models may drop leading conjunctions
- Use 'except' or 'however' when you mean exclusion to reduce logical ambiguity
- Repeat your actual goal after any contrast to keep the model focused

## Often confused with
- yet: stronger surprise or persistence, more formal
- however: more formal, often requires punctuation or new sentence
- except: pure exclusion without the contrastive weight
- although: subordinates the first clause rather than the second
- though: casual, can trail at sentence end
- and: additive rather than contrastive, opposite logical function