/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 25 Write the converse, inverse, and... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Write the converse, inverse, and contrapositive of each statement. If the president is telling the truth, then all troops were withdrawn.

Short Answer

Expert verified
The converse of the statement is 'If all troops were withdrawn, then the president is telling the truth'. The inverse is 'If the president is not telling the truth, then the troops were not withdrawn. The contrapositive is 'If the troops were not withdrawn, then the president is not telling the truth'

Step by step solution

01

Writing the Converse

The converse of a statement is created by swapping the hypothesis and the conclusion. Here, the hypothesis is 'The president is telling the truth', and the conclusion is 'all troops were withdrawn'. Consequently, the converse would be 'If all troops were withdrawn, then the president is telling the truth'.
02

Writing the Inverse

The inverse of a statement is found by negating both the hypothesis and conclusion of the original statement. The inverse of the given statement 'If the president is telling the truth, then all troops were withdrawn' would then be 'If the president is not telling the truth, then the troops were not withdrawn'.
03

Writing the Contrapositive

The contrapositive is created by swapping and negating both the hypothesis and conclusion. Therefore, the contrapositive of the original statement 'If the president is telling the truth, then all troops were withdrawn' becomes 'If the troops were not withdrawn, then the president is not telling the truth'.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Converse
In logic, the converse of a statement is formed by reversing the order of the hypothesis and the conclusion. This means that if you have an initial statement of the form "If P, then Q," the converse will be "If Q, then P." As such, the roles of the hypothesis and the conclusion are switched.
It's important to note that the truth value of the converse is not always the same as that of the original statement. For example, our original statement "If the president is telling the truth, then all troops were withdrawn" becomes "If all troops were withdrawn, then the president is telling the truth" when converted to its converse.
Understanding the converse helps to see if the reverse relationship holds true, but it must be analyzed separately to confirm its validity.
Inverse
The inverse of a logical statement is created by negating both the hypothesis and the conclusion. This means taking the original statement "If P, then Q" and transforming it to "If not P, then not Q."
Applying this to our statement "If the president is telling the truth, then all troops were withdrawn" gives us an inverse statement of "If the president is not telling the truth, then the troops were not withdrawn."
Just like the converse, the inverse does not necessarily share the same truth value as the original statement. Exploration of the inverse can reveal if the absence of the initial condition leads to the absence of the conclusion.
Contrapositive
The contrapositive of a statement is both the converse and the inverse combined. It flips the order of the hypothesis and the conclusion and then negates both.
In easier terms, for a statement "If P, then Q," its contrapositive is "If not Q, then not P." This transformation often keeps the truth value of the original statement intact.
This can be seen in our example: "If the president is telling the truth, then all troops were withdrawn" becomes "If the troops were not withdrawn, then the president is not telling the truth." The contrapositive is unique because, if the original statement is true, the contrapositive is always true.
Hypothesis
In logical statements, the hypothesis is the 'if' part of the statement. It's known as the antecedent and represents a condition that might be true. Recognizing the hypothesis is crucial for constructing the converse, inverse, and contrapositive.
For our example, "The president is telling the truth" is the hypothesis. It's the starting assumption or situation from which the conclusion is drawn.
When creating different forms of logical statements, clearly pinpointing the hypothesis aids in understanding the logical flow and determining the structure of alternative logical forms.
Conclusion
The conclusion is the 'then' part of a logical statement. It is the result or outcome that follows the hypothesis. Identification of the conclusion is essential in forming logical derivations like the converse, inverse, and contrapositive.
In the statement "If the president is telling the truth, then all troops were withdrawn," the conclusion is "all troops were withdrawn." It is what we accept or verify if the hypothesis is true.
Understanding the conclusion helps in evaluating the truth of related logical forms and aids in reasoning about the implications of a given hypothesis.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In this section, we used a variety of examples, including arguments from the Menendez trial, the inevitability of Nixon's impeachment, and Spock's (fallacious) logic on Star Trek, to illustrate symbolic arguments. a. From any source that is of particular interest to you (these can be the words of someone you truly admire or a person who really gets under your skin), select a paragraph or two in which the writer argues a particular point. (An intriguing source is What Is Your Dangerous Idea?, edited by John Brockman, published by Harper Perennial, 2007.) Rewrite the reasoning in the form of an argument using words. Then translate the argument into symbolic form and use a truth table to determine if it is valid or invalid. b. Each group member should share the selected passage with other people in the group. Explain how it was expressed in argument form. Then tell why the argument is valid or invalid.

Determine whether each statement makes sense or does not make sense, and explain your reasoning. I made Euler diagrams for the premises of an argument and one of my possible diagrams did not illustrate the conclusion, so the argument is invalid.

Translate each argument into symbolic form. Then determine whether the argument is valid or invalid. You may use a truth table or, if applicable, compare the argument's symbolic form to a standard valid or invalid form. (You can ignore differences in past, present, and future tense.) If The Graduate and Midnight Cowboy are shown, then the performance is sold out. Midnight Cowboy was shown and the performance was not sold out. \(\therefore\) The Graduate was not shown.

Write a valid argument on one of the following questions. If you can, write valid arguments on both sides. a. Should the death penalty be abolished? b. Should Roe \(v\). Wade be overturned? c. Are online classes a good idea? d. Should recreational marijuana be legalized? e. Should grades be abolished? f. Should the Electoral College be replaced with a popular vote?

Determine whether each statement makes sense or does not make sense, and explain your reasoning. I made Euler diagrams for the premises of an argument and one of my possible diagrams illustrated the conclusion, so the argument is valid.

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.