Propositional Analysis PHIL1290 Assessment

Assignment 1

PHIL1290

Submit a PDF or .doc or JPEG file on UMLearn with your answers to all of the questions below. (Mac users: .pages files are not acceptable) If any part of your assignment is written by hand, make sure that your handwriting is completely legible. This assignment is out of 50 points. Good luck! Due Feb 26th at midnight.

1. Propositions (12 pts)

For the following sentences, list the i) sentential connectives, ii) subjects, iii) quantifiers, iv) predicative connectives and v) simple predicates.

a) If all beers taste the same, then every stout is mild and

b) Either Sam will order you an Uber, or some person will drive you home

2. Necessary and Sufficient Conditions (4 pts)

a)Name one condition that is unnecessary but sufficient for being

b) Name one condition that is necessary and sufficient for getting

c) Name one condition that is necessary but insufficient for wearing

d) Name one necessary and sufficient condition for being

3. Definitions (14 pts)

Provide a 4-step definition for each of the following terms. (Clearly label the 4 elements)

a) Telephone

b) Restaurant

4. Validity (5pts)

Explain why the following argument is invalid using either the counter-example method or the replacement method. Explain invalidity in your explanation.

1. Anything for children is appropriate


2. Most cartoons are for children


3. There are no cartoons with violence

5. Lewis Carroll Diagrams (15 pts)

Use Lewis Carroll Models to determine whether the following arguments are valid. Show your work.

a)

1. Some workers are underpaid


2. Every underpaid worker is sad


3. Someone is sad

b)

1. John is both tall and a man


2. John is either a tree or not a man


3. John is a tree and a man

c)

1. Most fruit are sweet


2. Everything sweet has sugar


3. Most fruit has sugar