thumb|right|Is the glass half empty or half full?|Half a glass of water, illustration of two different mental attitudes, optimism (half full) and [[pessimism (half empty)]]
Optimism is the tendency to expect positive outcomes and to see situations in a favorable light, often illustrated by viewing a glass as "half full" rather than "half empty." It matters because how optimistic or pessimistic people are can shape their attitudes, decisions, and overall outlook on life.
AI-generated from the Wikipedia summary — may contain errors.
thumb|right|Is the glass half empty or half full?|Half a glass of water, illustration of two different mental attitudes, optimism (half full) and [[pessimism (half empty)]]
Optimism is the attitude or mindset of expecting events to lead to particularly positive, favorable, desirable, and hopeful outcomes. A common idiom used to illustrate optimism versus pessimism is a glass filled with water to the halfway point: an optimist is said to see the glass as half full, while a pessimist sees the glass as half empty. In ordinary English, optimism may be synonymous with idealism—often, unrealistic or foolish optimism in particular.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).