1K3
1K2
I'm a cute 14 years old boy, nice to meet you! My hobbies include writing fictional stories, composing songs, playing the piano, computer games, swimming and online games as well as maths solving and maths proving. Favorite authors include James Petterson, John Grisham and James Dashner. I'm good at swimming too! Read this blog for tons of sweet information!
|
|
Type
of paradox
|
Time travel paradox
|
|
Question?
|
Supposedly Joe Time Traveler
goes back in time and gets into a car accident. Tragically, he kills his
mother when he is just a child. Then what happens?
|
|
Note:
|
This is just “One” of
the many paradoxes that arise from the travel.
|
|
Meaning:
|
Reasoning which begins
with limited examples
|
|
Example
|
The first crow I saw
was black.
|
|
The second crow I saw
was black.
|
|
|
All crows I have ever
seen have been black.
|
|
|
Therefore all crows are
black.
|
|
Meaning:
|
Reasoning that begins
with premises and discover what meet-able results are from these premises.
|
|
Example
|
The sunrises every
morning.
|
|
Therefore, the sun will
rise tomorrow morning.
|
|
Definition:
|
The statement (~q ->
~p) is called the contra-positive of the statement
(p -> q)
|
|
|
Written:
|
~q -> ~p
|
|
|
Said:
|
If not Q, then not P.
|
|
|
Example:
|
p
|
Bessie is a cow.
|
|
q
|
She moos.
|
|
|
p -> q
|
If Bessie if a cow, she
moos.
|
|
|
~q -> ~p
|
If she does not moo,
she is not Bessie.
|
|