##  [Objective Chance](/objective-chance-0) 

 Definition

A property ascribed to physical systems or processes that characterizes their tendencies, dispositions, or long-run relative frequencies to produce specified outcomes independently of any particular agent’s degrees of belief; interpreted as an objective probability (e.g., propensity or physical frequency) within an explicit metaphysical or scientific framework.

 

 

 

 

 

 





## Principle

Principle

Objective chances function as physical or law-like constraints on expected outcome patterns; insofar as they are well-defined, they provide normative input for rational credences and decision procedures but remain distinct from those credences.

 

 

 

 

 





## Demonstration

Demonstration

Illustrative scenario — Situation: A manufacturing machine is calibrated so that defects occur with an objective chance of 0.05 per item (defined by production process). Recognition: Repeated sampling shows long-run defect frequency approximating 0.05. Action: Quality-control procedures and expected-loss calculations use 0.05 as the objective probability. Consequence: Decisions (e.g., batch rejection thresholds) are set using this chance as a parameter.

 

 

 

 

## Misapplication

Misapplication

Confusing objective chance with an agent's subjective probability. The error treats the physical propensity as identical to an individual's credence; while chances inform credences, they are not themselves degrees of belief.

 

 

 

 

 





## Consequence

Consequence

Objective chances ground statistical models, expected-value calculations, and objective risk assessments; they serve as parameters that constrain rational subjective probabilities and inform empirical predictions.

 

 

 

 

## Reversal

Reversal

In single-case or non-repeatable events, in deterministic theories without genuine stochasticity, or where the relevant physical dispositions are ontologically disputed, objective chances may be ill-defined or inapplicable.

 

 

 

 

 





## Boundary

Boundary

Clearly within: long-run relative frequencies or propensity parameters tied to repeatable physical processes. Boundary case: quantum mechanical probabilities where interpretation (objective propensity vs. epistemic amplitude) is contested. Clearly outside: purely epistemic probabilities reflecting only ignorance.

 

 

 

 

 





## Semantic Tension

Semantic Tension

Objective Chance ↔ Subjective Probability: objective chances prescribe constraints for rational credences but may conflict with personal priors or evidence, creating tension between physical propensity and personal belief.

 

 

 

 

 





## Synthesis

Synthesis

Objective chances are externally grounded probabilistic parameters that orient but do not replace subjective credences; their epistemic role depends on interpretation and the repeatability or dispositional character of the governed process.