the principle of indifference

The principle of indifference states that, when there is no reason to believe one outcome is more likely than another, we should assign them equal probabilities. Essentially, if we lack information favoring any particular option, we treat all options as equally probable. For example, if you flip a fair coin, you assign a 50/50 chance to heads or tails because no evidence suggests one is more likely. This principle helps guide rational decision-making in uncertain situations by ensuring our probability assessments are based solely on available knowledge, avoiding unwarranted assumptions.