Question

There are four cards:
A B 1 2
What cards would you need to flip to test the following statement:

If a card is even, the the other side will contain a vowel.

Answer 1

@dan815

Answer 2

Dan, you chose to flip A and 2.

Let's say on the other side of A is 3, and on the other side of 2 is E.

Answer 3

Does the statement still hold?

Answer 4

Odd has a vowel, and 2 has a vowel thas okay
it says
Vowel if number is Even
not
Vowel only if number is even

Answer 5

Next question. Is it possible that the statement is false?

Answer 6

if when we flip B, we saw an even then it can be false

Answer 7

Yeah, that's the trick.

Answer 8

Do you get it now?

Answer 9

:) REALLY??!

Answer 10

i dunno lol cuz i saw no point of confusion anywhere

Answer 11

Well, you chose A and 2, but you had to chose B and 2

Answer 12

ok wait lemme think

Answer 13

Both A and 1 are inconsequential, but for some reason you picked A.

Answer 14

oh i see okayy A can have odd or even yes

Answer 15

yeahh i see i took th statement/
Vowel iff even
but its
Vowe if even

Answer 16

Even -> Vowel means Not Even OR Vowel.
The contradiction would be Even AND Not Vowel

Answer 17

if even then vowel
iff even then vowel different from
if even then vowel
if odd then vowel or not vowel

Answer 18

yee i see okay

Answer 19

It's extremely simple, but easy to jump to the wrong conclusion.

Answer 20

Most people will pick A and 2, just like you did.

Answer 21

And some people will think you need to flip all four to be sure.