stemedb/sdk/go/examples/skeptic/main.go

// Package main demonstrates the Skeptic lens ("Trust but Verify").
//
// Unlike standard lenses that pick a single winner, the Skeptic lens
// shows all competing claims with their relative weights. This is critical
// for domains like medicine where you need to see disagreement.
package main

import (
	"context"
	"fmt"
	"log"

	"github.com/orchard9/stemedb-go/steme"
)

func main() {
	// Setup client
	signer, err := steme.GenerateSigner()
	if err != nil {
		log.Fatalf("Failed to generate signer: %v", err)
	}

	client := steme.NewClient("http://localhost:3000", signer)

	// Seed some conflicting assertions about Semaglutide's muscle effects
	seedConflictingData(client)

	// Query with Skeptic lens
	result, err := client.Skeptic(context.Background(), steme.SkepticQueryParams{
		Subject:   "Semaglutide",
		Predicate: "muscle_effect",
	})
	if err != nil {
		log.Fatalf("Failed to query: %v", err)
	}

	// Display the conflict analysis
	fmt.Printf("=== Skeptic Analysis: Semaglutide muscle_effect ===\n\n")

	fmt.Printf("Status: %s\n", result.Status)
	fmt.Printf("Conflict Score: %.2f (0.0=unanimous, 1.0=chaos)\n", result.ConflictScore)
	fmt.Printf("Candidates Considered: %d\n", result.CandidatesCount)
	fmt.Printf("Computed At: %d\n\n", result.ComputedAt)

	fmt.Printf("Competing Claims:\n\n")

	for i, claim := range result.Claims {
		fmt.Printf("Claim #%d: %v\n", i+1, claim.Value.Value)
		fmt.Printf("  Weight Share: %.1f%%\n", claim.WeightShare*100)
		fmt.Printf("  Assertions: %d\n", claim.AssertionCount)
		fmt.Printf("  Representative: %s\n", claim.RepresentativeHash[:16]+"...")
		fmt.Printf("  Source: %s\n", claim.Source.SourceHash[:16]+"...")

		if len(claim.SupportingAgents) > 0 {
			fmt.Printf("  Supporting Agents:\n")
			for _, agent := range claim.SupportingAgents {
				fmt.Printf("    - %s (trust: %.2f)\n", agent.AgentID[:16]+"...", agent.TrustScore)
			}
		}

		fmt.Println()
	}

	// Interpretation guide
	fmt.Printf("=== Interpretation ===\n\n")

	switch result.Status {
	case steme.ResolutionUnanimous:
		fmt.Println("✓ Unanimous: All sources agree on the same value.")
		fmt.Println("  You can trust this result with high confidence.")
	case steme.ResolutionAgreed:
		fmt.Println("⚠ Agreed: Strong majority (>75%) agrees, but some dissent exists.")
		fmt.Println("  The consensus is likely reliable, but review minority claims.")
	case steme.ResolutionContested:
		fmt.Println("⚠️ Contested: No clear consensus. Significant disagreement exists.")
		fmt.Println("  DO NOT rely on any single answer. Review all claims and sources.")
		fmt.Println("  This requires human judgment or additional research.")
	}
}

func seedConflictingData(client *steme.Client) {
	ctx := context.Background()

	// Claim 1: Significant muscle loss (Clinical evidence)
	claim1 := steme.NewAssertion("Semaglutide", "muscle_effect").
		WithText("significant_loss").
		WithConfidence(0.85).
		WithLifecycle(steme.LifecycleApproved).
		WithSourceClass(steme.SourceClassClinical).
		WithSourceHash("1111111111111111111111111111111111111111111111111111111111111111").
		Build()

	if _, err := client.Assert(ctx, claim1); err != nil {
		log.Printf("Warning: Failed to seed claim1: %v", err)
	}

	// Claim 2: Minimal muscle loss (Observational evidence)
	claim2 := steme.NewAssertion("Semaglutide", "muscle_effect").
		WithText("minimal_loss").
		WithConfidence(0.75).
		WithLifecycle(steme.LifecycleApproved).
		WithSourceClass(steme.SourceClassObservational).
		WithSourceHash("2222222222222222222222222222222222222222222222222222222222222222").
		Build()

	if _, err := client.Assert(ctx, claim2); err != nil {
		log.Printf("Warning: Failed to seed claim2: %v", err)
	}

	// Claim 3: No effect (Anecdotal evidence)
	claim3 := steme.NewAssertion("Semaglutide", "muscle_effect").
		WithText("no_effect").
		WithConfidence(0.60).
		WithLifecycle(steme.LifecycleProposed).
		WithSourceClass(steme.SourceClassAnecdotal).
		WithSourceHash("3333333333333333333333333333333333333333333333333333333333333333").
		Build()

	if _, err := client.Assert(ctx, claim3); err != nil {
		log.Printf("Warning: Failed to seed claim3: %v", err)
	}

	fmt.Println("✓ Seeded 3 conflicting claims about Semaglutide muscle_effect")
}