Logic 9 th grade Logic Week 1 Logic

Logic 9 th grade

Logic Week 1 • Logic: the study of arguments • Two Main Branches: Formal (Minor) and Material (Major) • Formal Logic: study of the form of an argument • Basic Model of Operation: • Mental Act Verbal Expression • Simple Apprehension Term • Judgment Proposition or Statement • Deductive Inference Syllogism or Argument

Logic Week 1 • the relationship between the Mental Act and Verbal Expression is a simple one: the Mental Act is what is thought and occurs only in the mind but must be turned into the Verbal Expression in order to be shared. Mental Act Verbal Expression

Logic Week 1 • In a short answer explain the relationship between Mental Act and Verbal Expression.

Logic Week 1 • • • Logic Review: 1. What is logic? 2. What are the branches of Logic? 3. What is Formal Logic? 4. Complete the Basic Model of Operation 5. Explain the relationship of the Basic Model of Operation

Logic Week 2 • Simple Apprehension • 1. Sense Perception • 2. Mental Image 3. Concept (abstract to essence: notes) • Comprehension • • *Porphyrian Tree

Logic Week 2 • Simple Apprehension: – The act of having a simple idea and is received through 3 steps: • First, one perceives something (Sense Perception) • Then, one is able to picture that thing in his or her mind without the object being present (Mental Image) • Finally, one is able to reduce the object in their mind to its basic Concept.

Logic Week 2 • Mental Act • 1. 2 3. • 2. • 3. Verbal Expression 1. 2. 3.

Logic Week 3 • Comprehension—the reducing of an idea into its concept – Also called its essence or notes

Porphyrian Tree • Substance: it exists either physically or as an idea. • Material: It has matter • Living: Organic material • Sentient: it can perceive the world around it. • Rational: it is capable of abstract thinking and communication—Mankind

Dog • To use the Porphyrian Tree you would first take the object being considered; then you would go down the list. • • EX: Ask: Does it exist? Does it take up space? Is it living? Is it aware of the world around it?

• To show comprehension of a dog’s existence you would simply list all of the notes in reverse order that applies to the idea. • Dog: Sentient, Living, Material Substance

Practice • • Copy the following and show comprehension: Barracuda Iron Ore Creeper Vines

Practice • Copy the following and show comprehension (list notes): • 1. dolphin • 2. pine tree • 3. copper • 4. surgeon

Extension • Extension: The extent of what belongs to a particular idea. • 2 ways: – Separating ideas from others • Dog, Roses, Gold • “of these three ideas, what belongs to the extension of living things? ” – What is covered by an idea • Dog: What belongs to this group called “Dog? ” • Answer: Every dog that is, was, or will be.

Practice • What is the extension of a psychologist? • What is the extension of elephant? • Using the list from Monday, answer these questions: – What belongs to the extension of rational? – What belongs to the extension of living?

Practice • Copy the following and show comprehension (list notes): • 1. anger • 2. lion • 3. gold • 4. fireman • Use the list from above and answer the following: • 1. What belongs to the extension of sentient? • 2. What belongs to the extension of metals? • What is the extension of democracy?

Practice 3/18 • Copy the following and show comprehension (list notes): • 1. computer • 2. daisies • 3. children • 4. fish • Use the list from above and answer the following: • 1. What belongs to the extension of machine? • 2. What belongs to the extension of plants? • What is the extension of zebra?

Practice, 3/19 • Copy the following and show comprehension (list notes): • 1. zebra • 2. tin • 3. gazelle • 4. palm tree • Use the list from above and answer the following: • 1. What belongs to the extension of animal? • 2. What belongs to the extension of non-sentient living things?

3/21 practice • What is the extension of lion? • Show comprehension for the following: • 1. dove • 2. love • 3. fireman • 4. gold • 5. tulip

4/8 Review Use the following list to answer the following: • rose bush doctor gold • iron ore oak tree building • gazelle kitten anger • • 1. What belongs to the extension of metal? • 2. What belongs to the extension of nonsentient living things?

4/8 Review • • Complete the steps of a Simple Apprehension 1. 2. 3. List the Properties of Simple Apprehension: 1. 2.

4/23 Logic Study • • Mental Act Verbal Expression Simple Apprehension Term Judgment Proposition or Statement Deductive Inference Syllogism or Argument

4/23 Logic Study • Term: The verbal expression of the simple apprehension. – The way in which we share a simple apprehension or idea by use of words.

• 2 Properties of term: • Signification: number of meanings a term has. – Univocal: one meaning – Equivocal: more than one meaning • Supposition: Existence of a term. – Verbal (Material): word (exists only as a word) – Logical: idea (exists as an idea) – Real: Actual (exists in the actual world)

Practice • Supposition Example: Dog • Dog rhymes with log. – (Verbal existence since we are using “dog” only as a word). • Dogs are mammals. – (Logical existence since we are talking about the idea of dogs and not an actual one. ) • My dog is a boxer. – (Real existence since there actually is a dog)

Practice • I. Copy each and state if the identified term is used univocally or equivocally: • 1. Liquids are kept in jars. /Jars can hold peanut butter. • 2. Men are sentient. /Sally is not a man. • Copy each and state the supposition of the underlined term: • 1. Amend rhymes with send. • 2. Animals are sentient.