I don't remember where I heard this, but I still like it a lot. 
Proof Techniques #2: Proof by Oddity
Sample: To prove that horses have an infinite number of legs.
- Horses have an even number of legs.
- They have two legs in back and fore legs in front.
- This makes a total of six legs, which is certainly an odd number of legs for a horse.
- The only number that is both even and odd is infinity.
- Therefore, horses have an infinite number of legs.
7
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I went out and counted my horse's legs and my my daughter's horse's legs, and all I could find was 4 on each of them. Are they deformed? Yikes!!
Wisewoman3
Level 7
Apr 18, 2018
1
I like this one better:
All horses are the same color.
Proof:
We proceed by induction.
Base case:
There is only one horse, and it is the same color as itself, so therefore the assertion is true for this case.
Inductive step:
Suppose that whenever we have n horses, they are all the same color. Now suppose we have n+1 horses. If we remove one horse, by our hypothesis, all the remaining horses have the same color. If we remove a different horse, all the remaining horses also have the same color, and this collection includes the original horse we removed. Thus all n+1 horses have the same color.
We conclude any number of horses all have the same color.
Deveno
Level 7
Apr 18, 2018
1
You people are wrecking my mind.
I’ve never heard the idea that infinity is both odd & even, but your post is entertaining none the less.
indirect76
Level 7
Apr 18, 2018
1
hypothosis 2 is not a correct interpretation of English, thus rendering the rest of the arguments invalid
magicwatch
Level 7
Apr 18, 2018
1
I could not resist sharing this on Facebook.
ArthurPhillips
Level 6
Apr 18, 2018
0
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