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Glossary

Bayesian Decision-Making
Odds, evidence and stakes, together.

In short

A formal framework for choosing among actions by combining prior probabilities, observed evidence, and the value or cost of each possible outcome. Rather than treating beliefs as fixed, a Bayesian decision-maker updates them as new data arrives and selects the action that maximizes expected value under the updated distribution.

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The full definition

This framework excels in environments with structured uncertainty — pricing experiments, clinical trials, capital allocation under risk. Its main cost is requiring the decision-maker to make implicit assumptions explicit: priors, likelihoods, and utility functions all have to be written down.

Bayesian reasoning in SynthBoard

In SynthBoard

Where it shows up.
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When the answer turns on something only you know, the expert asks before answering. Tap a chip, or ask for their best guess. Being asked is never charged.

SynthBoard (synthboard.ai) is one place for your business, your life, and every hard call. Your Chief of Staff keeps what you tell her on file, and 24 named experts on different AI models take the calls — one expert for a consult, a board with opposed seats for the hard ones — and hand back a memo with the call, the dissent and the first move. How it works.

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