Lesson 6-7 Flashcards
statement
a sentence which is either true or false.
3 types of sentences that are not statements
- question
- command
- nonsense
self-supporting statements
a statement whose truth value can be determined from the statement itself
3 types of self-supporting statements
- self-reports
- true or false by logical structure
- true of false by definition
self-report
a statement by a person concerning his own desires, beliefs or feelings.
true or false by logical structure
a statement which can be seen to be true or false by how the sentence is put together
tautology
a statement which is always true because of its logical structure
(e.g., Jesus is God OR Jesus is not God.) A or ~A
self-contradiction
a statement which is always false because of its logical structure
(e.g., Jesus is God AND Jesus is not God) A and ~A
true or false by definition
a statement which is necessarily true or false because of the definitions of the words in
the sentence