Question

What is the negation of this statement:

All girls are pretty.

Answer 1

there is at least one girl who is not pretty

Answer 2

why isn't it

All girls are not pretty?

Answer 3

because the negation of Ax is Ex

Answer 4

i always have trouble with these
is it Not all girls are prertty
or No girlsa are pretty ????

Answer 5

-Ax P(x) = Ex -P(x)

Answer 6

to negate all, you only need 1 counter example

Answer 7

so !(for all girl in Girls, girl is pretty) is actually

there is a girl in Girls, girl is not pretty

Answer 8

oh i see

Answer 9

looks like a suitable rendition, yes

Answer 10

so' not all girls are pretty' is close but too vague perhaps?

Answer 11

its accurate enough, but they usually want something more

Answer 12

think of it as negating the whole sentence:

not (all girls are pretty)

Answer 13

It is the case that NOT(all girls are pretty) is a suitable negation

Answer 14

Not all girls can translate to; theres got to be at least one girl

and pretty negates to unprettiful

Answer 15

right

Answer 16

of course, this sentance would have more meaning if it was babies and not girls ;)