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20 Cards in this Set
 Front
 Back
Conjecture

An educated guess


Inductive Reasoning

Looking at several specific situations to arrive at a conjecture


Counterexample

A false example to show that a conjecture is not true


Conditional

Statement that can be written in "ifthen" form


Hypothesis

The part of the conditional statement following the if


Conclusion

The part of the conditional statement following the then


Converse

Another ifthen statement formed by exchanging the hypothesis and conclusion of a conditional
q > p 

Negation

The denial of a statement
~p 

Inverse

A new conditional statement formed by negating both the hypothesis and conclusion
~p > ~q 

Contrapositive

Conditional statement formed by negating the hypothesis and conclusion of the converse of the given conditional
~q > ~p 

Postulate 21

Through any two points, there is exactly one line.


Postulate 22

Through any three noncollinear points, there is exactly one plane


Postulate 23

A line contains at least two points


Postulate 24

A plane contains at least three noncollinear points


Postulate 25

If two points lie in a plane, then the entire line containing those two points lies in that plane


Postulate 26

If two planes intersect, then their intersecion is a line


Venn diagram

Diagram sometimes used to illustrate a conditional


Law of Detachment

If p > q is a true conditional and p is true, then q is true


Deductive reasoning

A system for reaching logical conclusions using the law of detachment and other laws of logic


Law of Syllogism

If p > q and q > r are true conditionals, then p > r is also true
