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Fight breaks out at US OPEN

• http://www.dailymail.co.uk/news/worldnews/article-1308638/US-Open-2010-Spectator-brawl-interrupted-play-Flushing-Meadows.html

Systematic Invention• Act: What happened? What is the action? What

is going on? What action; what thoughts? • Scene: Where is the act happening? What is

the background situation? • Agent: Who is involved in the action? What are

their roles? • Agency: How do the agents act? By what

means do they act? • Purpose: Why do the agents act? What do

they want?

Systematic Invention• Who• What• Where• When• Why • How

SyllogismMajor premise: A general statement.

Minor premise: A specific statement.

Conclusion: based on the two premises.

Conditional Syllogisms• 1. General to particular. This is the kind most

people think of when they think of deduction. For example, the classic syllogism: – All men are mortal.

Socrates is a man. Therefore, Socrates is mortal.

• 2. General to General. Another kind of deduction arrives at new generalizations through the syllogism. For example: – All trees have root systems.

All root systems need nitrogen. Therefore, All trees need nitrogen.

Do these work?1. If you like molasses, grandma will

buy you a bottle. But you don't like molasses, so grandma will not buy you a bottle.

Does these work?2. The tires must be replaced if the

wear indicators are showing. The tires must be replaced. Therefore, the wear indicators are showing.

Do these work?3. If you were self-motivated, you

would be a good student. But you aren't self-motivated, so you aren't a good student.

Do these work?4. If George wanted a richer, fuller life,

he would read good literature. Ah, I see he is reading some good literature now. He must want a richer, fuller life.

Do these work?5. If lettuce is on sale today, Sally will

make grinder sandwiches. Sally is not making grinder sandwiches; therefore, lettuce is not on sale today.

Do these work?6. If Breenthorpe didn't get drunk all

the time, the people would vote for him. But he does get drunk all the time, so the people won't vote for him.

Do these work?7. You will scold the carpenter if he has

made you a bad table. Therefore, this carpenter has made you a bad table because I see you are scolding him.

Do these work?8. If it's after 10:00, the program has

started. Ah, it is 11:30 now, so the program has started.

Do these work?9. If this ice cream has peanut butter

in it, I am allergic to it. Our tests confirm that it contains no peanut butter, so I am therefore not allergic to this ice cream.

Disjunctive Syllogism• One of the alternatives is for formal

reasons assumed to be necessarily true, so that to deny one leaves the other as the only possibility

• Either A or B Not A; therefore B

Do these work?1. Either Freentop is a crook, or he is a

very crafty individual. I know he is very crafty, so he is not then a crook.

Do these work?2. Either Bleps are Snords or Vlots are

Snords. Vlots are not Snords. Therefore, Bleps are Snords.

Do these work?3. Either that statement is wrong or

Jones is in error. But that statement is right, so Jones is in error.

Do these work?4. Either I am perfectly logical or you

are logical. And since I am indeed perfectly logical, you are not logical.

What fallacy is this???

Do these work?5. Either the oven does not work or I

left out the baking soda. But the oven does work, so I left out the baking soda.

Conjunctive Syllogism• In the major premise of this syllogism

two propositions, called conjuncts, are presented, both of which cannot be true simultaneously

• A cannot be both B and C A is B; therefore A is not C

Do these work?1. A lawnmower cannot be both

durable and inexpensive. But this lawnmower is expensive, so it must be durable.

Do these work?2. I cannot both go to a movie and

finish my term paper. And I must finish my term paper. Therefore, I cannot go to a movie.

Do these work?3. Norman has proved repeatedly that

he cannot be both a high-speed driver and a safe, accident-free driver. He has just arrived safely from Albuquerque, so he surely drove at a reasonable speed.

Do these work?4. No person can be both rich and

poor. And that Helen is certainly not poor. So, she must be rich.