beliefnoun
bih-LEEF
An acceptance that something is true or real, held with varying degrees of confidence and not necessarily supported by proof. Beliefs can be based on evidence, experience, authority, or faith.
"Her belief that hard work always leads to success was tested when she was laid off despite years of effort."
opinionnoun
uh-PIN-yun
A view or judgment about something that is not necessarily based on fact or knowledge. Unlike a belief, an opinion typically acknowledges that other views are possible.
"In my opinion, the policy is misguided — but I recognize that reasonable people can disagree."
convictionnoun
kun-VIK-shun
A firmly held belief or opinion, held with great confidence and often resistant to challenge. Conviction implies emotional as well as intellectual commitment.
"He spoke with such conviction that even his opponents found it hard to dismiss his argument."
factnoun
fakt
A thing that is known or proven to be true, verifiable through evidence or observation. Facts are distinguished from opinions or beliefs by their independent verifiability.
"It is a fact that the Earth orbits the Sun — this is not a matter of opinion."
valuenoun
VAL-yoo
A principle or standard of behavior that a person or group considers important or desirable. Values guide decisions and are often held more deeply than ordinary beliefs.
"Honesty is a core value for her — she would rather lose a friend than tell a comfortable lie."
assumptionnoun
uh-SUMP-shun
Something accepted as true without proof or verification, often unconsciously. Assumptions underlie arguments without being stated or examined.
"The whole argument rested on the assumption that people act rationally — which is often false."
worldviewnoun
WURLD-vyoo
A comprehensive framework of beliefs through which a person interprets and understands the world. A worldview shapes what questions seem important and what answers seem plausible.
"His religious worldview meant that he interpreted even scientific discoveries through a spiritual lens."
ideologynoun
eye-dee-OL-uh-jee
A system of ideas and ideals, especially one that forms the basis of a political or economic theory. Ideologies organize beliefs into coherent frameworks for understanding society.
"Their political ideology led them to oppose almost every form of government intervention in the economy."
doctrinenoun
DOK-trin
A set of beliefs or principles held and taught by a religion, political party, or other group. Doctrine is authoritative within its community and typically not open to individual revision.
"Church doctrine held that the Earth was the center of the universe — a belief Galileo's discoveries challenged directly."
dogmanoun
DOG-muh
A principle or set of principles laid down by an authority as incontrovertibly true. The word carries a negative connotation of rigidity and resistance to questioning.
"He rejected the economic dogma of his party and began asking uncomfortable questions about inequality."
premisenoun
PREM-is
A statement or idea that forms the basis of an argument; a starting assumption from which a conclusion is drawn. If the premise is false, the conclusion may be invalid even if the reasoning is sound.
"The debate stalled because the two sides were arguing from completely different premises about human nature."
axiomnoun
AK-see-um
A statement or proposition that is regarded as being self-evidently true and accepted without proof. Axioms serve as the starting points for entire systems of reasoning.
"'All people are created equal' functions as a political axiom in many democratic systems."
certaintynoun
SUR-tun-tee
The state of being absolutely sure about something; the absence of doubt. Certainty is often contrasted with probability and is rarely fully justified in complex matters.
"She spoke with complete certainty, which made the audience uncomfortable — few things in life are truly certain."
creednoun
kreed
A formal statement of beliefs or aims; a personal set of guiding principles. A creed is often recited or declared publicly as an affirmation of identity or loyalty.
"His personal creed was simple: treat others as you wish to be treated, and question everything else."
epistemologynoun
ih-pis-teh-MOL-uh-jee
The branch of philosophy concerned with the nature and scope of knowledge — how we know what we know, and what distinguishes justified belief from opinion. It asks: what counts as knowledge?
"Epistemology asks fundamental questions: can we ever be truly certain about anything, or is all knowledge provisional?"
skepticismnoun
SKEP-tih-siz-um
A questioning attitude toward claims that are not supported by evidence; doubt as a default intellectual stance. In philosophy, skepticism refers to doubt about the possibility of certainty itself.
"Her healthy skepticism meant she always asked for evidence before accepting any extraordinary claim."
empiricismnoun
em-PEER-ih-siz-um
The theory that knowledge comes primarily from sensory experience and observation, rather than reason alone. Empiricism is the philosophical foundation of modern science.
"Empiricism insists that we should believe what the evidence shows, not simply what seems logical in the abstract."
rationalismnoun
RASH-un-ul-iz-um
The theory that reason, rather than experience, is the foundation of knowledge. Rationalists argue that some truths can be known through pure thought, without needing observation.
"Rationalism holds that mathematical truths — like 2 + 2 = 4 — are known through reason, not through touching or seeing objects."
intuitionnoun
in-too-ISH-un
The ability to understand or know something without conscious reasoning; a feeling or sense that something is true. Intuition may be fast, reliable pattern recognition — or it may be bias in disguise.
"Her intuition told her the deal was wrong, and months later the company collapsed — but was it insight or luck?"
faithnoun
fayth
Strong belief in something without requiring or demanding proof; trust or confidence in a person, idea, or doctrine. Faith often sustains beliefs in areas where evidence is absent or incomplete.
"Her faith in the justice system remained strong even after her wrongful conviction — a remarkable form of resilience."
superstitionnoun
soo-per-STISH-un
A widely held but irrational belief in supernatural influences, often based on tradition or fear rather than evidence. Superstitions are beliefs that persist even in the absence of supporting logic.
"Breaking a mirror brings seven years of bad luck — that's a superstition, not a fact, no matter how widely it's believed."
biasnoun
BY-us
A tendency to prefer certain ideas, people, or outcomes in a way that prevents fair judgment; a systematic distortion in thinking. Biases can be conscious or deeply unconscious.
"Every researcher must acknowledge their own biases and describe how they tried to minimize them."
confirmation biasnoun phrase
kon-fur-MAY-shun BY-us
The tendency to search for, interpret, and remember information in a way that confirms what you already believe. Confirmation bias makes people harder to persuade and more likely to misread evidence.
"Confirmation bias explained why both sides read the same study and concluded that it supported their existing views."
cognitive dissonancenoun phrase
KOG-nih-tiv DIZ-uh-nuns
The mental discomfort experienced when holding two contradictory beliefs, or when actions conflict with beliefs. People typically resolve cognitive dissonance by changing a belief or rationalizing the contradiction.
"He experienced cognitive dissonance when he realized that his dietary choices conflicted with his environmental values."
heuristicnoun
hyoo-RIS-tik
A mental shortcut or rule of thumb that allows quick decisions without full analysis. Heuristics are efficient but can produce systematic errors when applied in the wrong context.
"'If it sounds too good to be true, it probably is' is a heuristic — a shortcut that protects us from most scams."