/**
* Structured Argumentation Operation
*
* Builds and analyzes structured arguments using formal reasoning principles
*/
import { BaseOperation, type OperationContext, type OperationResult } from '../base.js';
export class StructuredArgumentationOperation extends BaseOperation {
name = 'structured_argumentation';
category = 'collaborative';
async execute(context: OperationContext): Promise<OperationResult> {
const { sessionState, prompt, parameters } = context;
// Extract argumentation parameters
const argumentType = this.getParam(parameters, 'argumentType', 'deductive');
const premises = (parameters.premises as string[]) || [];
const conclusion = this.getParam(parameters, 'conclusion', '');
const counterarguments = (parameters.counterarguments as any[]) || [];
const rebuttals = (parameters.rebuttals as any[]) || [];
const evidenceStrength = this.getParam(parameters, 'evidenceStrength', 'moderate');
// Generate premises if not provided
const generatedPremises = premises.length === 0 ?
this.generatePremises(prompt, argumentType) : premises;
// Generate conclusion if not provided
const generatedConclusion = conclusion || this.generateConclusion(generatedPremises, argumentType);
// Validate argument structure
const validity = this.validateArgument(generatedPremises, generatedConclusion, argumentType);
// Generate counterarguments if not provided
const generatedCounterarguments = counterarguments.length === 0 ?
this.generateCounterarguments(generatedPremises, generatedConclusion) : counterarguments;
// Generate rebuttals if not provided
const generatedRebuttals = rebuttals.length === 0 ?
this.generateRebuttals(generatedCounterarguments) : rebuttals;
// Assess overall argument strength
const argumentStrength = this.assessArgumentStrength(
validity,
generatedCounterarguments,
generatedRebuttals,
evidenceStrength
);
const argumentationData = {
topic: prompt,
argumentType,
premises: generatedPremises,
conclusion: generatedConclusion,
validity,
counterarguments: generatedCounterarguments,
rebuttals: generatedRebuttals,
argumentStrength,
evidenceStrength,
logicalForm: this.extractLogicalForm(generatedPremises, generatedConclusion, argumentType),
sessionId: `argument-${Date.now()}`,
timestamp: new Date().toISOString(),
};
// Update session metrics
sessionState.updateKPI('argument_premises', generatedPremises.length);
sessionState.updateKPI('counterarguments_addressed', generatedCounterarguments.length);
return this.createResult({
...argumentationData,
sessionContext: {
sessionId: sessionState.sessionId,
stats: sessionState.getStats(),
},
});
}
private generatePremises(topic: string, argumentType: string): string[] {
const templates = {
deductive: [
`All instances of ${topic} share certain characteristics`,
`The current case exhibits these characteristics`,
`Therefore, logical conclusions follow`,
],
inductive: [
`Multiple observed cases of ${topic} show a pattern`,
`This pattern appears consistent across contexts`,
`Similar cases likely follow the same pattern`,
],
abductive: [
`We observe certain phenomena related to ${topic}`,
`A specific explanation would account for these phenomena`,
`No alternative explanation is as plausible`,
],
analogical: [
`${topic} is similar to a known case in relevant ways`,
`The known case has certain properties`,
`The similarities are significant enough to transfer properties`,
],
};
return templates[argumentType as keyof typeof templates] || templates.deductive;
}
private generateConclusion(premises: string[], argumentType: string): string {
const conclusionTemplates = {
deductive: 'Therefore, the conclusion follows necessarily from the premises',
inductive: 'Therefore, this pattern likely holds in general',
abductive: 'Therefore, this explanation is most likely correct',
analogical: 'Therefore, the same properties apply to this case',
};
return conclusionTemplates[argumentType as keyof typeof conclusionTemplates] ||
'Therefore, the conclusion follows from the premises';
}
private validateArgument(premises: string[], conclusion: string, argumentType: string): any {
const validity = {
isValid: true,
strength: 'strong',
issues: [] as string[],
type: argumentType,
};
// Basic validation checks
if (premises.length < 2) {
validity.isValid = false;
validity.strength = 'weak';
validity.issues.push('Insufficient premises for strong argument');
}
if (!conclusion || conclusion.length < 10) {
validity.isValid = false;
validity.strength = 'weak';
validity.issues.push('Conclusion is too vague or missing');
}
// Type-specific validation
switch (argumentType) {
case 'deductive':
if (!this.hasLogicalConnection(premises, conclusion)) {
validity.issues.push('Premises do not logically entail conclusion');
validity.strength = 'moderate';
}
break;
case 'inductive':
if (premises.length < 3) {
validity.issues.push('Inductive arguments need more evidence');
validity.strength = 'moderate';
}
break;
case 'abductive':
validity.issues.push('Abductive reasoning requires comparison of explanations');
validity.strength = 'moderate';
break;
case 'analogical':
validity.issues.push('Analogical arguments depend on similarity strength');
validity.strength = 'moderate';
break;
}
return validity;
}
private hasLogicalConnection(premises: string[], conclusion: string): boolean {
// Simple heuristic: check for common logical connectors
const logicalWords = ['therefore', 'thus', 'hence', 'follows', 'implies'];
return logicalWords.some(word =>
conclusion.toLowerCase().includes(word) ||
premises.some(premise => premise.toLowerCase().includes(word))
);
}
private generateCounterarguments(premises: string[], conclusion: string): any[] {
return [
{
type: 'premise_challenge',
argument: 'One or more premises may be false or unsupported',
target: 'premises',
strength: 'moderate',
description: 'Challenges the truth of the underlying premises',
},
{
type: 'alternative_explanation',
argument: 'Alternative explanations may better account for the evidence',
target: 'conclusion',
strength: 'moderate',
description: 'Proposes competing explanations for the same evidence',
},
{
type: 'scope_limitation',
argument: 'The argument may not apply broadly or may have exceptions',
target: 'generalization',
strength: 'weak',
description: 'Questions the scope or universality of the conclusion',
},
];
}
private generateRebuttals(counterarguments: any[]): any[] {
return counterarguments.map((counter, index) => ({
targets: counter.type,
rebuttal: this.generateSpecificRebuttal(counter.type),
strength: this.calculateRebuttalStrength(counter.strength),
evidence: `Supporting evidence for rebuttal ${index + 1}`,
effectiveness: Math.random() * 0.4 + 0.6, // 0.6-1.0
}));
}
private generateSpecificRebuttal(counterType: string): string {
const rebuttals = {
premise_challenge: 'The premises are well-supported by multiple independent sources',
alternative_explanation: 'Alternative explanations lack the explanatory power of the original',
scope_limitation: 'The argument applies within clearly defined scope parameters',
};
return rebuttals[counterType as keyof typeof rebuttals] ||
'This counterargument does not significantly weaken the original argument';
}
private calculateRebuttalStrength(counterStrength: string): string {
const strengthMap = {
'weak': 'strong',
'moderate': 'moderate',
'strong': 'weak',
};
return strengthMap[counterStrength as keyof typeof strengthMap] || 'moderate';
}
private assessArgumentStrength(
validity: any,
counterarguments: any[],
rebuttals: any[],
evidenceStrength: string
): any {
let baseScore = validity.isValid ? 0.7 : 0.3;
// Adjust for validity strength
const strengthMultiplier = {
'weak': 0.8,
'moderate': 1.0,
'strong': 1.2,
};
baseScore *= strengthMultiplier[validity.strength as keyof typeof strengthMultiplier] || 1.0;
// Adjust for counterarguments and rebuttals
const counterargumentPenalty = counterarguments.length * 0.1;
const rebuttalBonus = rebuttals.length * 0.05;
const finalScore = Math.max(0.1, Math.min(1.0, baseScore - counterargumentPenalty + rebuttalBonus));
return {
overall: finalScore,
category: finalScore > 0.8 ? 'strong' : finalScore > 0.6 ? 'moderate' : 'weak',
factors: {
validity: validity.strength,
evidence: evidenceStrength,
counterarguments: counterarguments.length,
rebuttals: rebuttals.length,
},
confidence: Math.round(finalScore * 100),
};
}
private extractLogicalForm(premises: string[], conclusion: string, argumentType: string): any {
// Simplified logical form extraction
const form = {
type: argumentType,
structure: this.getArgumentStructure(argumentType),
premises: premises.map((premise, index) => ({
id: `P${index + 1}`,
statement: premise,
role: this.identifyPremiseRole(premise, index),
})),
conclusion: {
id: 'C',
statement: conclusion,
follows_from: premises.map((_, index) => `P${index + 1}`),
},
validity: this.assessLogicalValidity(argumentType),
};
return form;
}
private getArgumentStructure(argumentType: string): string {
const structures = {
deductive: 'If P1 and P2, then C',
inductive: 'P1, P2, P3... suggest C',
abductive: 'C best explains P1, P2, P3...',
analogical: 'P1 is like P2, P2 has property X, therefore P1 has property X',
};
return structures[argumentType as keyof typeof structures] || 'P1, P2... therefore C';
}
private identifyPremiseRole(premise: string, index: number): string {
if (index === 0) return 'major';
if (premise.toLowerCase().includes('current') || premise.toLowerCase().includes('this')) {
return 'minor';
}
return 'supporting';
}
private assessLogicalValidity(argumentType: string): string {
// Simplified validity assessment
const validityTypes = {
deductive: 'necessarily_valid',
inductive: 'probably_valid',
abductive: 'plausibly_valid',
analogical: 'conditionally_valid',
};
return validityTypes[argumentType as keyof typeof validityTypes] || 'conditionally_valid';
}
}
export default new StructuredArgumentationOperation();