Nature and the Human Person - Chapter 5

What is personal identity?

The question of what makes someone the same person over time despite changes to their body, thoughts, memories, and personality.

What is the problem of personal identity?

How can we say that a person today is the same person they were years ago when so much about them has changed?

What is numerical identity?

Being one and the same individual, rather than merely being similar.

Why is personal identity philosophically difficult?

Because almost everything about us can change while we still consider ourselves to be the same person.

What is the bodily continuity theory?

The idea that you remain the same person because you have the same physical body over time.

What is a problem with the body theory?

Our bodies change constantly, including cells, appearance, and physical condition.

What thought experiment challenges bodily identity?

A situation where someone's mind or consciousness is transferred into another body.

Why would this create a problem?

It raises the question of whether the person goes with their body or their mind/personality.

What is psychological continuity?

The idea that personal identity depends on the continuation of things such as memories, beliefs, personality, intentions, and consciousness.

Why might memory be important to personal identity?

Your memories connect your present self with your past experiences.

What is a problem with using memory to define identity?

People can forget things, have false memories, or remember events differently.

What is the 'memory criterion'?

The idea that you are the same person as someone in the past if you can remember that person's experiences.

What is one major problem with the memory criterion?

It seems circular: you have to already be the person who experienced something in order to genuinely remember experiencing it.

Why doesn't change necessarily destroy personal identity?

We normally consider someone to remain the same person even though their body, personality, beliefs, and circumstances change.

What is an example of gradual change?

A child grows into an adult while still being considered the same person.

Why is gradual change philosophically important?

It raises the question of how much change can happen before someone becomes a different person.

Why do philosophers use thought experiments when discussing personal identity?

They allow us to imagine unusual situations that test whether our definition of identity actually works.

What does a body-switching thought experiment ask?

If two people's bodies were switched but their minds/personality remained, who would each person be?

What does a teleportation thought experiment ask?

If your body were destroyed and an identical version recreated somewhere else, would the recreated person actually be you?

What is the problem with creating a perfect copy of someone?

If the copy has the same memories and personality, it may seem like 'you,' but there would now be two individuals.

What makes you the same person you were five years ago?

Possible answers include bodily continuity, psychological continuity, memory, or some combination of these.

Is your body enough to explain personal identity?

Not necessarily. Thought experiments involving body switching suggest that we may identify a person with their psychological characteristics rather than merely their body.

Are your memories enough to explain personal identity?

Not necessarily, because memories can disappear, change, or be inaccurate.

Why is the problem of personal identity important?

It affects questions about responsibility, punishment, survival, death, relationships, and what happens to 'you' over time.

What is bodily continuity?

The view that you remain the same person because your physical body continues through time.

What is the memory criterion?

The view that you are the same person as someone in the past if you remember that person's experiences.

What is the problem with the memory criterion?

Memory can be lost or inaccurate, and defining memory in terms of personal identity can make the theory circular.

Why are thought experiments useful?

They test our ideas about identity by putting them into unusual situations.

What is the central question of the chapter?

What makes you the same person despite all the changes you experience throughout your life?

What is the Body Theory?

You remain the same person because you have the same physical body over time.

What does the Body Theory identify you with?

Your physical body.

What is a problem with the Body Theory?

Our bodies change over time, so it can be difficult to explain exactly what makes the body the "same" body.

What is the Brain Theory?

You remain the same person because you have the same brain over time.

Why does the brain seem important to personal identity?

The brain is responsible for memories, thoughts, personality, and consciousness.

What is a major problem for Brain Theory?

Thought experiments involving brain transplants raise the question of whether your identity follows your brain.

What is the Psychological Theory?

Personal identity depends on the continuity of your psychological characteristics, such as memories, beliefs, personality, and intentions.

What is important about Psychological Theory?

It focuses on your mental life rather than your physical body.

What is a problem with Psychological Theory?

Psychological characteristics can change or disappear, especially memories.

What is the Soul Theory?

You remain the same person because you have the same immaterial soul.

What is the advantage of Soul Theory?

It can explain how someone remains the same person even when their body and psychological characteristics change.

What is the major problem with Soul Theory?

It is difficult to prove or identify the existence of a soul.

What is the No-Self Theory?

There is no permanent, unchanging self that remains identical throughout life.

What does No-Self Theory say about personal identity?

What we call a "self" is a collection or series of changing physical and psychological experiences.

Why is No-Self Theory challenging?

It conflicts with our everyday belief that we are one continuous person who remains the same throughout life.

Which theory focuses on the physical body?

Body Theory

Which theory focuses specifically on the brain?

Brain Theory

Which theory focuses on memories, personality, beliefs, and intentions?

Psychological Theory

Which theory says an immaterial soul makes you the same person?

Soul Theory

Which theory denies that there is a permanent self?

No-Self Theory