Results 1 to 3 of 3

Thread: valid or invalid argument?

  1. July 2nd 2009, 02:21 PM #1
    aeubz
    aeubz is offline
    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. July 2nd 2009, 02:39 PM #2
    pickslides
    pickslides is offline
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,234
    Thanks
    26
    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. July 2nd 2009, 02:54 PM #3
    aeubz
    aeubz is offline
    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+
« Bases | Is the statement compound? »

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: November 24th 2011, 05:41 PM
  2. IS this proof valid or invalid?
    Posted in the Number Theory Forum
    Replies: 5
    Last Post: August 9th 2011, 01:48 PM
  3. Determine if valid or invalid by use of truth tables, standard forms...
    Posted in the Discrete Math Forum
    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: April 28th 2008, 09:52 AM
  5. valid or invalid ?
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: October 20th 2007, 09:55 AM

Search Tags


/mathhelpforum @mathhelpforum