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15 questions
If I plant a tree, then I will get dirt under my nails. I didn’t get dirt under my nails. Therefore, I didn’t plant a tree
Valid
Invalid
If I don’t change my oil regularly, my engine will die. My engine died. Thus, I didn’t change my oil regularly.
Valid
Invalid
All frogs are amphibians. All frogs have gills. Therefore, all amphibians have gills.
Valid
Invalid
You will meet a tall, handsome stranger or you will stay home and pick fleas off of your cat. You didn’t meet and tall, handsome stranger. Therefore, you stayed home and picked fleas off of your cat.
Valid
Invalid
If I don’t tie my shoes, then I trip. I didn’t tie my shoes. Hence, I tripped.
Valid
Invalid
All racers live dangerously. Gomer is a racer. Therefore, Gomer lives dangerously.
Valid
Invalid
If you aren’t polite, you won’t be treated with respect. You aren’t treated with respect. Therefore, you aren’t polite.
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Invalid
If you are kind to a puppy, then he will be your friend. You weren’t kind to that puppy. Hence, he isn’t your friend.
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Invalid
If you drink Surge, then you won’t fall off of your skateboard. You fell off of your skateboard. Therefore, you didn’t drink Surge.
Valid
Invalid
If I don’t pay my income taxes, then I file for an extension or I am a felon. I’m not a felon and I didn’t file for an extension. Therefore, I paid my income taxes.
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Invalid
I wash the dishes or I don’t eat. I eat. Thus, I wash the dishes.
Valid
Invalid
All protons are subatomic particles. All neutrons are subatomic particles. Hence, all protons are neutrons.
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Invalid
All sneaks are devious. All swindlers are sneaks. Therefore, all swindlers are devious
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Invalid
All superheroes wear capes. The Masked Gomer wears a cape. Hence, The Masked Gomer is a superhero.
Valid
Invalid
All wolverines are cuddly. No weasels are wolverines. Thus, no weasels are cuddly.
Valid
Invalid
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