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Person

Person is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Person rather than just read about it. In short: A person (pl.: people or persons, depending on context) is a being who has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among…

Person — main illustration
Person — illustration

Key takeaways

  • Person belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Person to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Person from memory before moving on to harder problems.

Reference excerpt

A person (pl.: people or persons, depending on context) is a being who has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of person. The plural form "persons" is often used in philosophical and legal writing.

Personhood

The criteria for being a person... are designed to capture those attributes which are the subject of our most humane concern with ourselves and the source of what we regard as most important and most problematical in our lives. Personhood is the status of being a person. Defining personhood is a controversial topic in philosophy and law, and is closely tied to legal and political concepts of citizenship, equality, and liberty. According to common worldwide general legal practice, only a natural person or legal personality has rights, protections, privileges, responsibilities, and legal liability. Personhood continues to be a topic of international debate, and has been questioned during the abolition of slavery and the fight for women's rights, in debates about abortion, fetal rights, and in animal rights advocacy. Various debates have focused on questions about the personhood of different classes of entities. Historically, the personhood of women and slaves has been a catalyst of social upheaval. In most societies today, postnatal humans are defined as persons. Likewise, certain legal entities such as corporations, sovereign states and other polities, or estates in probate are legally defined as persons. However, some people believe that other groups should be included; depending on the theory, the category of "person" may be taken to include or not pre-natal humans or such non-human entities as animals, artificial intelligences, or extraterrestrial life.

Personal identity

Personal identity is the unique identity of persons through time. That is to say, the necessary and sufficient conditions under which a person at one time and a person at another time can be said to be the same person, persisting through time. In the modern philosophy of mind, this concept of personal identity is sometimes referred to as the diachronic problem of personal identity. The synchronic problem is grounded in the question of what features or traits characterize a given person at one time. Identity is an issue for both continental philosophy and analytic philosophy. A key question in continental philosophy is in what sense we can maintain the modern conception of identity, while realizing many of our prior assumptions about the world are incorrect. Proposed solutions to the problem of personal identity include continuity of the physical body, continuity of an immaterial mind or soul, continuity of consciousness or memory, the bundle theory of self, continuity of personality after the death of the physical body, and proposals that there are actually no persons or selves who persist over time at all.

Development of the concept In ancient Rome, the word persona (Latin) or prosopon (πρόσωπον; Ancient Greek) originally referred to the masks worn by actors on stage. The various masks represented the various "personae" in the stage play. The concept of person was further developed during the Trinitarian and Christological debates of the 4th and 5th centuries in contrast to the word "nature". During the theological debates, some philosophical tools (concepts) were needed so that the debates could be held on common basis to all theological schools. The purpose of the debate was to establish the relation, similarities and differences between the logos (Ancient Greek: Λóγος, romanized: Lógos/Verbum) and God. The philosophical concept of person arose, taking the word "prosopon" (Ancient Greek: πρόσωπον, romanized: prósōpon) from the Greek theatre. Therefore, the logos (the Ancient Greek: Λóγος, romanized: Lógos/Verbum), which was identified with the Christ, was defined as a "person" of God. This concept was applied later to the Holy Ghost, the angels and to all human beings. Trinitarianism holds that God has three persons. Since then, a number of important changes to the word's meaning and use have taken place, and attempts have been made to redefine the word with varying degrees of adoption and influence. According to Jörg Noller, at least six approaches can be distinguished:

… excerpt ends here. Continue reading the full article.

Illustrations

Person: A 12-year-old male person
A 12-year-old male person
Person: An abstract painting of a person by Paul Klee. The concept of a person can be very challenging to define.
An abstract painting of a person by Paul Klee. The concept of a person can be very challenging to define.
Person: "What does it take for individuals to persist from moment to moment – or in other words, for the same individual to exist at different moments?"
"What does it take for individuals to persist from moment to moment – or in other words, for the same individual to exist at different moments?"

Worked examples

Example 1 — a first encounter with Person

Start with the simplest possible case. Write down what Person claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Person before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Person ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Person

In research
Person appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Person in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Person is common in secondary-school and first-year university syllabi. It links to neighbouring topics Concepts in social philosophy, Humans, Metaphysics of mind, so understanding it makes those chapters shorter.
In everyday life
Look for Person outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Person in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Person means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Person out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Person in simple terms?

A person (pl.: people or persons, depending on context) is a being who has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsib…

Why does Person matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Person?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Person.

Tags

  • Concepts in social philosophy
  • Humans
  • Metaphysics of mind
  • People
  • Personhood

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