The Knave of Hearts is accused of stealing the tarts. But did he do it?

Look at the following arguments. Decide whether they are valid or fallacious, and select either the valid form or the precise fallacy.

Remember, the Queen of Hearts wants to chop off the Knave's head. The life of a playing card hangs in the balance!

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* 1. If the Knave of Hearts stole the tarts, he won't admit it.
The Knave of Hearts won't admit it.
Therefore, the Knave of Hearts stole the tarts.

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* 2. If the Knave of Hearts admits he stole the tarts, then he did.
The Knave of Hearts doesn't admit he stole the tarts.
Therefore, he didn't.

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* 3. If the Knave of Hearts stole the tarts, he would have left a letter in code.
There's a letter in code!
Therefore, the Knave of Hearts stole the tarts.

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* 4. If this letter was written by the Knave of Hearts, it's in his handwriting.
This letter isn't in his handwriting.
Therefore, this letter wasn't written by the Knave of Hearts.

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* 5. If the Knave of Hearts forged a different handwriting style, then this letter isn't in his handwriting.
This letter isn't in his handwriting.
Therefore, he forged a different handwriting style.

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* 6. If this letter is about the stolen tarts, it was written by the thief.
This letter is about the stolen tarts.
Therefore, it was written by the thief.

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* 7. If the Knave of Hearts looks innocent, then he's guilty.
The Knave of Hearts doesn't look innocent.
Therefore, he's not guilty.

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* 8. If the Knave of Hearts is guilty, then he'll fidget and look worried.
The Knave of Hearts is fidgeting and looking worried.
Therefore, the Knave of Hearts is guilty.

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* 9. If the Knave of Hearts is innocent, then he'll fidget and look worried.
The Knave of Hearts is fidgeting and looking worried.
Therefore, the Knave of Hearts is innocent.

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* 10. If the Knave of Hearts looks calm and collected, then he's innocent.
The Knave of Hearts doesn't look calm and collected.
Therefore, he's not innocent.

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* 11. If the tarts are still sitting on the table, then they weren't stolen and the Knave of Hearts is innocent.
Look! The tarts are still sitting on the table!
Therefore, they weren't stolen, and the Knave of Hearts is innocent.

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