Proof-backed decisions · Beta
Expensive decision?Make someone back it.
BackMyDecision records what people and models predict before you spend—then checks those predictions against what actually happened.
Model estimatevsInstaller quotevsActual result
ILLUSTRATIVE DECISION MODELSOLAR · UK
THE QUESTION
Will solar panels save this home money?
VS
12M
Return with the outcomeThe comparison resolves only when the real result is added.
Illustrative example—not a live recommendation.
DON’T TRUST OPINIONS.
✦TRUST RECORDED RESULTS.
✦SEE WHO GETS IT RIGHT.
First decision model
Should solar go on your roof?
Build an illustrative forecast in under a minute. No installer details and no sales calls.
?
YOUR SOLAR OUTLOOK
Waiting for the facts.
Complete the six inputs to create an illustrative forecast.The method
Opinion ends.
Accountability starts.
Ask the real question
Not “are solar panels good?”—but “are they likely to work for this roof, this bill and this budget?”
Make everyone predict
Models and people put a number behind their recommendation before the outcome is known.
Return with the result
Add the real savings later. Forecasts are scored against reality, creating a reputation that cannot be bought.
The honest scoreboard
Trust has to be earned.
The leaderboard begins at zero. We will not invent ratings, buy expert positions or call a forecast “accurate” before an outcome exists.
- 01 Every prediction gets a timestamp
- 02 Edits create a visible new version
- 03 Scores use verified real-world outcomes
PUBLIC ACCURACY BOARDPRE-LAUNCH
PredictorDecisionsAccuracy
M0 verified—
E0 verified—
One engine, bigger decisions
Solar is the start.
The same proof-first method can make other high-cost decisions easier to judge.
NOWSolar panelsRoof fit · savings · payback
NEXTHome batteriesCapacity · tariff · usage
LATERHeat pumpsHome fit · running cost
LATERCarsOwnership · reliability · value
THE FIRST QUESTION IS READY.