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---
name: single-factor-removal
description: Remove one specified factor from the artifact's support structure and reason about how the conclusion changes.
execution: subagent
prompt: ./prompt.md
input: artifact (string), factor_to_remove (string), factors_list (list)
used-by: [counterfactual-probing]
---
# Single Factor Removal
Ablation unit: removes one factor and reasons about conclusion stability.
## Execution
Subagent — spawned via subagent-spawning/spawn-agent.
## Why Subagent
Each removal must be reasoned about independently to avoid contamination from other removal results.
## Input
- **artifact**: The original artifact
- **factor_to_remove**: Which factor to remove
- **factors_list**: All factors (for context of what remains)
## Output
- **conclusion_before**: Original conclusion status
- **conclusion_after**: Conclusion status without this factor
- **degradation_score**: 0.0 (no effect) to 1.0 (collapse)
- **reasoning**: Why the conclusion is/isn't affected
## Budget
One unit = one factor removal per invocation.