Discrete Mathematics

62 DISCRETE MATHEMATIC..._

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that the right hand side

of

an implication is the result

of

the left hand side.

For the other connective,

H,

we write

(pH

q) and say "p

if

and only

if

q". Now if we look at the truth

table, we will see that

(pH

q) is true only when both p and q are both true

or

both false. In effect, it is saying

that

p and q are equivalent.

1.10.1

Mental

Imagery:

Cause

and

Effect

Implication can be thought

of

as cause and effect. The phrase "cause and effect" refers to the cause

of

some

action and its resulting effect. For example, we could say,

if

Vasant drops an egg on the floor (the cause), it

will ...