Results 1 to 3 of 3

Thread: valid or invalid argument?

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    61

    Exclamation valid or invalid argument?

    I need help on this problem!

    Some investments are risky.
    Real estate is an investment.
    Therefore Real estate is risky.

    is the argument valid or invalid?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,237
    Thanks
    33
    Invalid because of the word highlighted in red.

    Some investments are risky.
    Real estate is an investment.
    Therefore Real estate is risky.

    Real Estate may not be a risky investment. The following would be valid

    All investments are risky.
    Real estate is an investment.
    Therefore Real estate is risky.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2008
    Posts
    61
    Quote Originally Posted by pickslides View Post
    Invalid because of the word highlighted in red.

    Some investments are risky.
    Real estate is an investment.
    Therefore Real estate is risky.

    Real Estate may not be a risky investment. The following would be valid

    All investments are risky.
    Real estate is an investment.
    Therefore Real estate is risky.
    Thank you!!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. How do I know if an argument is valid or invalid?
    Posted in the Discrete Math Forum
    Replies: 5
    Last Post: Nov 24th 2011, 05:41 PM
  2. IS this proof valid or invalid?
    Posted in the Number Theory Forum
    Replies: 5
    Last Post: Aug 9th 2011, 01:48 PM
  3. Replies: 2
    Last Post: May 16th 2011, 01:09 PM
  4. Valid or Invalid Arguments
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: Apr 28th 2008, 09:52 AM
  5. valid or invalid ?
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: Oct 20th 2007, 09:55 AM

Search Tags


/mathhelpforum @mathhelpforum