Definition

Adjective: 1. Relating to or based on probability: Describing something that involves, is measured by, or is governed by the mathematical laws of chance and likelihood. 2. Relating to the philosophy of probabilism: Pertaining to the ethical doctrine, particularly in Roman Catholic moral theology, that in cases of doubt one may follow a probable opinion, even if a contrary opinion is more probable.

Usage and Examples

• General/Scientific Context: Used to describe systems, models, or reasoning where outcomes are not certain but can be assigned a likelihood.
  • The weather forecast is probabilistic, giving a 60% chance of rain.
  • Quantum mechanics is a fundamentally probabilistic theory.
• Philosophical/Historical Context: Used to describe arguments or frameworks related to the doctrine of probabilism.
  • The theologian engaged in a probabilistic debate about moral certainty.

Advanced Usage

• Probabilistic Model: A mathematical model that incorporates randomness and uncertainty to predict the likelihood of various outcomes.
  • Financial analysts use probabilistic models to assess investment risks.
• Probabilistic Reasoning: The process of drawing conclusions based on incomplete or uncertain information by weighing probabilities.
  • Medical diagnosis often involves probabilistic reasoning based on symptoms and test results.

Variants and Related Words

• Probability (n): The measure of the likelihood that an event will occur.
• Probabilistically (adv): In a way that involves or is based on probability.
  • We can only answer that question probabilistically.

Synonyms

• Stochastic: (Often used in technical/scientific contexts) Involving a random variable; having a random probability distribution.
• Statistical: Relating to the use of statistical methods, which are often based on probability.
• Uncertain: Not able to be relied on; not completely known. (Note: This is a more general synonym, lacking the mathematical precision of "probabilistic").

Antonyms

• Deterministic: Operating according to the principle of determinism, where every event or state is the inevitable result of preceding events, leaving no room for probability.
• Certain: Known for sure; established beyond doubt.
• Definitive: Serving to provide a final solution or to end a situation; conclusive.

Adjective

1. of or relating to or based on probability
   • probabilistic quantum theory
2. of or relating to the Roman Catholic philosophy of probabilism