Making Inferences & Deductive Reasoning

Which pattern IS logical?

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Which pattern IS logical?

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If a sequence is not logical, then it is...

• unlogical

• nonlogical

• illogical

• antilogical

An inference is...

• a logical leap based on true premises

• using premises to rule possible conclusions in or out

• a piece of information we use as evidence

Deductive reasoning is...

• a logical leap based on true premises

• using premises to rule possible conclusions in or out

• a piece of information we use as evidence

What is a logical inference you can make about the premises below?

Jade pulled the chocolate chip cookies out of the hot oven. After looking at them for a moment, she put them back into the oven and set her timer for two more minutes.

• Jade's cookies are burnt to a crisp

• Jade doesn't like baking

• Jade's cookies weren't quite done baking

What is a logical inference you can make about the premises below?

Luke looked at all the different chess pieces. He held up one in the shape of a horse: "Where does this one go?" he asked Cris. Cris pointed to a black square next to another funny-looking piece.

• Luke is an expert at chess.

• Luke is learning how to play chess.

• Chess is Luke's favorite afterschool activity.

Premise: I only have pets with fur.

Using deductive reasoning, which answer can you RULE OUT?

• I have two fish and a dog.

• I have one dog and two cats.

• I have two rabbits.

Premise: Paul's birthday is in the summertime.

Using deductive reasoning, which answer can you RULE OUT?

• Paul's birthday is June 17th

• Paul's birthday is August 5th

• Paul's birthday is November 19th

Premises: Tala's shoe size is greater than her sister's. Her sister's shoe size is 5.

Using deductive reasoning, which answer can you RULE IN?

• Tala's shoe size could be 2

• Tala's shoe size could be 4

• Tala's shoe size could be 6