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#1 2016-09-16 14:37:33

Randomusername
Guest

If a Cat is A Bird, then it is Friday?

So I was doing my geometry and I came across this question:

Determine if each conditional is true. If false, give a counterexample:
If a cat is a bird, then it is Friday.

As we did this a month ago, we (class of 5 students) are debating on whether this is true or false, though the book says it is true.

So would this be true or false?

(I'm on the false side)

#2 2016-09-16 16:33:16

thickhead
Member
Registered: 2016-04-16
Posts: 1,086

Re: If a Cat is A Bird, then it is Friday?

Whether it is true or false depending on the day.
If it is Friday it is true.
Another way to make it true is to name a bird as "cat".


{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

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#3 2016-09-16 19:51:40

Bob
Administrator
Registered: 2010-06-20
Posts: 10,052

Re: If a Cat is A Bird, then it is Friday?

hi Randomusername

The truth table for if-then ( https://en.wikipedia.org/wiki/Truth_table ) is that it is only FALSE if the first statement is FALSE and the second TRUE.  Therefore the compound statement is TRUE unless it is Friday.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

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#4 2016-09-21 16:00:46

Monox D. I-Fly
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From: Indonesia
Registered: 2015-12-02
Posts: 2,000

Re: If a Cat is A Bird, then it is Friday?

How did this question get in geometry?


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.

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#5 2016-09-21 18:52:04

Bob
Administrator
Registered: 2010-06-20
Posts: 10,052

Re: If a Cat is A Bird, then it is Friday?

Maybe the topic covers the use of logical proofs ?

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

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