critical thinking

is this an example of an invalid argument

All crows are black
John is black
Therefor, John is a crow.

is this an example of a unsound argument

All dogs are black
Lassie is a dog
Lassie is a cat

Please tell me if this is right.


You're right for both arguments.

The premise for the first statement is correct. But obviously the conclusion is wrong -- making the argument invalid.

The premise for the second argument is not correct. Therefore it is both invalid and unsound.

  1. 👍 0
  2. 👎 0
  3. 👁 52

Respond to this Question

First Name

Your Response

Similar Questions

  1. english

    please help revise In the research analysis paper I will write about black women and their oppression. I will focus on how black women have overcome oppression and look at women in power such as Oprah, Condalisa Rice, and other.

    asked by jenny on February 27, 2008
  2. english

    please help revise In the research analysis paper I will write about black women and their oppression. I will focus on how black women have overcome oppression and look at women in power such as Oprah, Condalisa Rice, and other.

    asked by jenny on February 27, 2008
  3. biology urgent

    In mice, a gene controlling coat colour has 2 alleles; B (black) and b (white). A pure breeding black mouse is crossed to a white mouse and all the offspring are black. The offspring are then crossed to white mice. The phenotypes

    asked by alex on February 24, 2013
  4. math

    I am having trouble understanding how to solve this problem. I found an answer, about 74.2%, but I am not sure if that is correct. Any help would be greatly appreciated! A chess board has 64 squares, 32 white and 32 black, and is

    asked by anonymous on May 25, 2015
  5. Math for Liberal Arts

    Directions: Define the necessary symbols, rewrite the argument in symbolic form, and us a truth table to determine whether the argument is valid. If the argument is invalid, interpret the specific circumstances that cause the

    asked by Dawn on November 8, 2012
  6. math

    In Carl's drawer, he has white,gray,and black socks. In his closet,he has black brown,and blue shoes. I need to make a diagrdiagram to display the sample space for Carl choosing a sock and shoe color. Is this right

    asked by vivian on January 21, 2015
  7. biology

    North American wolves can have gray fur or black fur. A single gene with two alleles codes for fur color. Information about the fur color of parents and offspring in four wolf families is shown below. Family 1 | gray fur x black

    asked by elizabeth on January 2, 2019
  8. math

    A draw contains 3 black socks and 2 white socks. A sock isdrawn at random and then replaced. Find each probability. p(2 black) p(black, then white) p(white, then black) p(2white)

    asked by sherry on October 28, 2011
  9. chemistry

    which is the most reactive form of phosphorus? blue, red, white or black? or are they all equally reactive? I suppose its a matter of how you define reactive but I would go with white since that reacts at room temperature with

    asked by naty girl on April 23, 2007
  10. american history

    Which of the following is true of the Spanish-American War? A: The black soldiers who fought had gained experience and distinction during the Indian Wars B: Racial tensions were suspended for the duration of the war C: About 1 in

    asked by Anonymous on September 27, 2012

More Similar Questions