Trivia Time

Which of the following statements best reflects the meaning of Aristotle's Law of Identity?

Test Your Knowledge

identity

American  

[ahy-den-ti-tee, ih-den-] / aɪˈdɛn tɪ ti, ɪˈdɛn- /

noun

• identities
  plural

1. the state or fact of remaining the same one or ones, as under varying aspects or conditions.

   The identity of the fingerprints on the gun with those on file provided evidence that he was the killer.

2. the condition of being oneself or itself, and not another.

   He began to doubt his own identity.

3. condition or character as to who a person or what a thing is; the qualities, beliefs, etc., that distinguish or identify a person or thing.

   a case of mistaken identity;

   a male gender identity;

   immigrants with strong ethnic identities.

4. the state or fact of being the same one as described.

5. the sense of self, providing sameness and continuity in personality over time and sometimes disturbed in mental illnesses, as schizophrenia.

   Synonyms:

   uniqueness, distinctiveness, personality, individuality

6. exact likeness in nature or qualities.

   an identity of interests.

7. an instance or point of sameness or likeness.

   to mistake resemblances for identities.

8. Logic. an assertion that two terms refer to the same thing.

9. Mathematics.

   1. an equation that is valid for all values of its variables.

   2. Also called unit element, unity, identity element. an element in a set such that the element operating on any other element of the set leaves the second element unchanged.

   3. the property of a function or map such that each element is mapped into itself.

   4. the function or map itself.

10. Australian Informal. an interesting, famous, or eccentric resident, usually of long standing in a community.

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identity British  

/ aɪˈdɛntɪtɪ /

noun

1. the state of having unique identifying characteristics held by no other person or thing

2. the individual characteristics by which a person or thing is recognized

3. Also called: numerical identity. the property of being one and the same individual

   his loss of memory did not affect his identity

4. Also called: qualitative identity. the state of being the same in nature, quality, etc

   they were linked by the identity of their tastes

5. the state of being the same as a person or thing described or claimed

   the identity of the stolen goods has not yet been established

6. identification of oneself as

   moving to London destroyed his Welsh identity

7. logic

   1. that relation that holds only between any entity and itself

   2. an assertion that that relation holds, as Cicero is Tully

8. maths

   1. an equation that is valid for all values of its variables, as in ( x – y )( x + y ) = x ² – y ². Often denoted by the symbol ≡

   2. Also called: identity element. a member of a set that when operating on another member, x, produces that member x: the identity for multiplication of numbers is 1 since x .1 = 1. x = x See also inverse

9. informal a well-known person, esp in a specified locality; figure (esp in the phrase an old identity )

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Usage

What is identity? Identity is the unique set of characteristics that can be used to identify a person as themself and no one else. The word can be used in different ways in different contexts. On a personal level, identity often refers to a person’s sense of self, meaning how they view themself as compared to other people. Practically speaking, a person’s identity is who they really are. A detective may try to determine the identity of a suspect—meaning who that person is (including things like their real name). A case of mistaken identity involves someone being mistaken for someone they are not. Superheroes often have secret identities. The concept of identity is complex and can involve all kinds of characteristics, qualities, experiences, interests, and other aspects of a person that make them distinct from anyone else. In the term identity politics, identity refers to the cultural, ethnic, gender, racial, religious, social, or other facets that a person considers as inherent to who they are, especially in relation to their belonging in a particular group or community of similar people. Identity can involve physical traits, such as eye color or height, but it doesn’t necessarily involve such things. For example, the crime of identity theft usually involves stealing someone’s personal information, not their physical appearance (except in the movie Face/Off). Example: The journalist refused to reveal the identity of her source. Example: Being a Black bisexual woman is a huge and important part of my identity, but it’s not my whole identity: I’m a coder; I’m a Knicks fan; I love dogs—my identity can’t be easily defined with a few words.

Other Word Forms

Derived Forms

• nonidentity
  noun

Inflected Forms

Nouns

• identities
  plural

Etymology

Origin of identity

First recorded in 1560–70; from Late Latin identitās, equivalent to Latin ident(idem) “repeatedly, again and again,” earlier unattested idem et idem ( idem neuter of īdem “the same” + et “and”) + -itās noun suffix; see -ity

Explanation

Your identity is what makes you "you." If you are having "an identity crisis," then I guess you can't figure out who you are. Good luck with that. The noun identity can also refer to a name or persona. Criminals tend to use false identities so they won't get caught. If you falsely identify someone, it is a case of "mistaken identity." The word identity doesn't have to be used for a single person either. People refer to "corporate identity" when talking about what makes a company unique.

Example Sentences

See Examples For:

identity identities

In 2024 Jaguar unveiled its new identity to the public.

From BBC ● Oct. 7, 2026

The identity of the foreign official was not revealed.

From Barron's ● Oct. 6, 2026

Human identity doesn’t change,” said Jay Chaudhry, founder and CEO of cybersecurity company Zscaler.

From The Wall Street Journal ● Oct. 6, 2026

Even beyond policy prescriptions, having renter candidates embrace their tenant identity has been useful for connecting with young voters, Litman said.

From MarketWatch ● Oct. 6, 2026

What we did object to were the identity cards each citizen was issued.

From "The Hiding Place" by Corrie ten Boom

Why the couple used surrogacy to have so many children, as well as the identities of the children’s biological parents, remain under investigation, Hochman said Tuesday.

From The Wall Street Journal ● Oct. 6, 2026

We have changed Seo's name and the names of another victim in this story to protect their identities.

From BBC ● Oct. 4, 2026

The San Francisco-based AI lab did not confirm their identities, but at least two of the employees worked on safety and alignment, according to the Wall Street Journal and Bloomberg.

From Barron's ● Oct. 2, 2026

Of the five customers disclosed by the company, the identities of only three have been publicly confirmed: Anthropic, Google and startup Reflection AI.

From MarketWatch ● Sep. 28, 2026

“Like fingerprinting! They’re checking our identities, making sure we really are the babies from the plane, I bet. Whatever you do, don’t touch that rock! Just pretend.”

From "Found" by Margaret Peterson Haddix

Related Words

• character
• existence
• identification
• integrity
• name
• personality
• status