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Chapter Glossary
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accidental property  A property a thing can lose without ceasing to exist.
animalism  The doctrine that identical persons are those with identical living human bodies.
apparent memory  A memory of an event that either didn't happen or that was not caused by the event it records.
brain theory  The doctrine that identical persons are those who are psychologically continuous with one another and whose psychology is caused by and realized in the same brain.
closest continuer theory  The doctrine that identical persons are those who are the closest continuers of one another.
direct memory  A memory that a person can consciously recall.
essential property  A property a thing cannot lose without ceasing to exist.
indirect memory  A memory that an earlier stage of a person can consciously recall.
memory theory  The doctrine that identical persons are those who share at least one experience memory.
nonbranching theory  The doctrine that identical persons are those who are psychologically continuous with one another and whose causal connection has not branched.
numerical identity  Two objects are numerically identical if and only if they are one and the same.
only x and y principle  The principle that whether one thing, x, is identical to another thing, y, can only depend on facts about x and y.
psychological connectedness  Two people are psychologically connected if they can directly (consciously) quasi-remember and quasi-desire the same things.
psychological continuity  Two people are psychologically continuous with one another if they form part of an overlapping series of persons who are psychologically connected with one another.
psychological continuity theory  The doctrine that identical persons are those who are psychologically continuous with one another.
qualitative identity  Two objects are qualitatively identical if and only if they share the same properties (qualities).
quasi-desire  An apparent desire that is caused in the right way by an actual desire.
quasi-memory  An apparent memory caused in the right way by an actual experience.
real memory  A memory of an event that was experienced by the person remembering it and that was caused by the event it records.
soul theory  The doctrine that identical persons are those with identical souls.







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