Confirmation bias is the tendency to search for information that confirms our preconceptions and to ignore contradictory evidence. This means we actively seek out sources and data that support what we already believe, interpret ambiguous information in a way that reinforces our view, and remember supporting details more readily than those that oppose it. In real life, this shows up when people choose to read articles or consult experts who echo their beliefs, and discount or overlook evidence that challenges them. That focus on confirming what we think is exactly what the prompt describes. The other biases don’t fit this pattern. The representativeness heuristic is about judging how likely something is based on how closely it resembles a familiar category, not about seeking confirmatory information. The availability heuristic relies on what’s most memorable or easiest to recall to judge frequency or probability. Hindsight bias is the "I knew it all along" feeling after an event, overestimating how predictable the outcome was.

Heuristics are quick, rule-of-thumb problem-solving strategies. They let you make fast judgments by relying on mental shortcuts rather than full analysis. They’re efficient and useful in everyday decisions, but they can lead to errors because they sacrifice thoroughness. An algorithm is a precise step-by-step procedure that guarantees a solution; insight is a sudden realization; trial-and-error involves trying multiple options until one works, which can be slow and unreliable. So the term that describes a quick, rule-of-thumb approach is heuristics.

Obsession is a persistent, intrusive thought, image, or urge that a person cannot escape or ignore. This description fits a thought, idea, feeling, or impulse that keeps intruding despite attempts to dismiss it. In contrast, a compulsion is the repetitive action taken to try to relieve the distress caused by the obsession. An impulse is a sudden urge but not necessarily one that is relentless or distressing over time. A delusion is a firmly held false belief that remains despite evidence to the contrary.

A phoneme is the smallest unit of sound that can distinguish meaning. In English, swapping the initial sounds in words like “bat” and “pat” changes the meaning, because /b/ and /p/ are different phonemes. Phonemes are about sound units that create different words, whereas morphemes are the smallest units that carry meaning themselves (like “dog” or the plural suffix “-s”). Phonology is the study of how these sounds are organized in a language, and allophones are variant pronunciations of the same phoneme that don’t change meaning.