Logic

Front 1

objective theory of truth

Back 1

All declarative sentences (propositions) are either true or false, even if when we use them we don't know.

Hint 1

all..are..even

Front 2

argument

Back 2

An argument is a "piece of reasoning" in which one or more propositions are used in support of another.

Hint 2

an..is..in which..of

Front 3

induction

Back 3

An argument in which the conclusion is not entailed in the premises.

Front 4

deduction

Back 4

An argument in which the conclusion is entailed in the premises.

Front 5

cogent arguments

Back 5

Arguments in which it is reasonable to believe the conclusion based upon the premises.

Hint 5

reasonable

Front 6

pattern 1

Back 6

Most As are Bs
X is an A
........
X is a B

Front 7

Pattern 2

Back 7

X is an A
X is a B
Most ABs are Cs
.....
X is a C

Front 8

Pattern 3

Back 8

All As are Bs
Most Bs are Cs
X is an A
.....
X is a C

Front 9

contradictories

Back 9

Two propositions ate contradictories if one is the denial or negation of the other-that is, they cannot both be true and cannot both be false

Front 10

contraries

Back 10

Two propositions are said to be contraries if they cannot both be true- that is if the truth of one entails the falsity of the other-but both can be false.

Hint 10

ball game

Front 11

subcontraries

Back 11

Two propositions are said to be subcontraries if they cannot both be false, although they may both be true.

Front 12

I

Back 12

All movies have endings
All films are movies
Therefore all films have endings

Front 13

II

Back 13

All two part movies have no actors
All Hunger Games movies have two parts
Therefore all Hunger Games movies have no actors

Front 14

V

Back 14

All pencils have ingredients
All cookies have pencils
Therefore all cookies have ingredients

Front 15

VI

Back 15

All movies have sound
all cartoons have sound
therefore all cartoons are movies

Front 16

VII

Back 16

All movies have sound
all cartoons have sound
therefore all movies are cartoons