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Question: i need help with this symbolic logic homework 1 when...

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I need help with this Symbolic logic homework.

1. When and only when is an argument valid?

2. Translate the below statement fully into symbolic form.

Though Joe was illiterate, Bob could read.

3. Fully translate the below sentence into symbolic form.

Only when the leaves turn will Mary not be sleeping outside.

4.Fully translate the below argument into symbolic form.(Here's that funny symbol: Ⱶ )

The roses are blooming but are infested with aphids. The ladybugs are happy if the roses are infested with aphids. Mary will be happy if the roses are blooming. Therefore, Mary and the ladybugs are happy.

5. Fully translate the below argument into symbolic form.(Here's that funny symbol: Ⱶ )

Either Bill or Larry are at the store. If Larry is at the store when Bill isn't, then the cash is gone only provided that the safe is open. So, unless the safe is open, the cash isn't gone.

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