Compound Fork — Robotaxi × Mars uncrewed
Each cell = a joint scenario "Both branches fire". Cell intensity = total |Δ| across the 200 highest-conviction tradeable predictions vs their unconditional posterior. Joint probabilities approximated via log-odds combination (assumes conditional independence given the prediction — coarse but bounded). Click a cell to drill into the dominant single-fork view.
Pick two fork families
| Robotaxi ↓ × Mars uncrewed → | MARS_2026 prior 25% | MARS_2028 prior 50% | MARS_2031PLUS prior 25% |
|---|---|---|---|
ROBOTAXI_TESLA_2026 prior 40% | 131 claims · Σ|Δ| 18.73 | 131 claims · Σ|Δ| 18.71 | 131 claims · Σ|Δ| 18.71 |
ROBOTAXI_NATIONWIDE_2028 prior 45% | 131 claims · Σ|Δ| 18.78 | 131 claims · Σ|Δ| 18.77 | 131 claims · Σ|Δ| 18.77 |
ROBOTAXI_MASS_2030 prior 30% | 128 claims · Σ|Δ| 18.46 | 128 claims · Σ|Δ| 18.44 | 128 claims · Σ|Δ| 18.44 |
ROBOTAXI_DELAYED prior 20% | 131 claims · Σ|Δ| 18.80 | 131 claims · Σ|Δ| 18.78 | 131 claims · Σ|Δ| 18.78 |
Method note
Joint conditional probability is approximated via log-odds combination: logit(P(pred|A,B)) ≈ logit(P(pred|A)) + logit(P(pred|B)) − logit(P(pred)). This is the closed-form Bayesian update assuming A and B are conditionally independent given the prediction. It's correct when the two scenarios act on the prediction through different causal paths; it's pessimistic when they overlap. The exact joint requires running the Gibbs sampler with both scenarios clamped, which would be N×M=16 sampling runs (~12 minutes per refresh) instead of N+M=8 — a 2× cost for higher fidelity.