Question

Contrapositives.. this one's confusing..

Answer 1

State the contrapositive of the statement:
"If you can't play baseball, then I can't ride a horse."

It's already a negative statement.. what...

Answer 2

@satellite73 @ganeshie8

Answer 3

this is what you call a post hoc ergo proper hoc statement

Answer 4

it is already negated, so negate it again

Answer 5

lol

not not = yes

Answer 6

If i can ride a horse,then you can play baseball.

Answer 7

for example "then i cannot ride a horse" would turn in to "then i CAN ride a horse"

Answer 8

\( -(-p \rightarrow -q)\) I cant make the little enye symbol haha,.

Answer 9

Oh. That makes sense. x'D
Negative + Negative= Positive.

Answer 10

\[\lnot\]

Answer 11

use `\neg` for \(\neg\) @Jhannybean

Answer 12

example: "if I don't answer questions on OS, then I cannot become 99 SS"

Answer 13

\lnot

Answer 14

Ohh, I see @ganeshie8

Answer 15

or apparently \neg
\[\neg\] i didn't know that one , always used \lnot

Answer 16

as in \lor and \land

Answer 17

\[\lor, \land\]

Answer 18

\[\lnot ~(\lnot~ p \rightarrow \lnot ~q)\]

Answer 19

What about the little arcs ontop like line segments and stuff? (sorry off topic)

Answer 20

equivalent

`\wedge` \(\wedge \)

`\vee` \(\vee\)

Answer 21

what little arcs?

Answer 22

`\overline{AB}` \(\overline{AB}\)

`\overrightarrow{AB}` \(\overrightarrow{AB}\)

Answer 23

\[\overbrace{a}\]

Answer 24

\[m\angle AB = \frac{1}{2}\text{arc}~CD\] if you wanted to use the arc symbol instead of writing arc?

Answer 25

arc is not there in basic latex i think

Answer 26

Darn.

Answer 27

\[\overleftarrow{ab}\]

Answer 28

forgot about that one

Answer 29

\overarc{CD}

hmm

works here...
http://latex.codecogs.com/gif.latex? \overarc{CD}

Answer 30

\(\large \widehat{AB}\)

Answer 31

thats the close thing that works here

`\widehat`

Answer 32

That's the closest we'll get apparently

Answer 33

\overarc looks pretty though
but that requires an additional package or something..

Answer 34

Really hope more latex can be added to OS...somehow.

Answer 35

http://gyazo.com/fb461eb910b43235c3f1c8a47cb88e26

Answer 36

\[\stackrel{\mbox{$\frown$}}{CD}\]

:)

Answer 37

\stackrel{\mbox{$\frown$}}{CD}

Answer 38

Someone give Zarkon a medal immediately. Lol.

Answer 39

it crowns only one character

Answer 40

I can make it work with 2-3 characters on my program but it doesn't work here

Answer 41

http://latex.codecogs.com/gif.latex? \stackrel{\mbox{\Huge{~$\frown$}}}{ACD}

Answer 42

you have to copy and paste the entire link

Answer 43

Ummmmm.... okay, anyway...

\(\Large\bf\color{red}{\bigstar~T}\color{gold}{H}\color{lime}{A}\color{cyan}{N}\color{blueviolet}{K}\color{magenta}{S}\color{orchid}{!~\bigstar}\)

Answer 44

And btw, is anyone else having the issue where the "Post" button gets hidden, and if the text is long enough, the text does also?
It's annoying. >.<

Answer 45

Right now I'm experiencing the site crashing on me every 5-10 minutes or so. Closed my browser, cleared the cache, logged out, etc, doesn't really help anything.

Answer 46

Hmm, I'm not getting that, but I usually have that problem. :p

Answer 47

there is a keyboard shortcut which you may use for posting @Whitemonsterbunny17

Answer 48

tab + enter

Answer 49

after typing in the textbox,

press tab and hit enter

Answer 50

Yeah, tab, but that doesn't help when I'm trying to type and it hides my words. .-.