Following are adapted from Symbolic Logic by Lewis Carroll. Reorder the premises

Question

Following are adapted from Symbolic Logic by Lewis Carroll. Reorder the premises in the following argument so that conclusion follows logically. (It may be helpful to rewrite some of the statements in if-then form and to replace some statements by their contra positives.)
1. When I work a logic example without grumbling, you may be sure it is one I understand.
2. The arguments in these examples are not arranged in regular order like the ones I am used to.
3. No easy examples make my headache.
4. I can’t understand examples if the arguments are not arranged in regular order like the ones I am used to.
5. I never grumble at an example unless it gives me a headache.
Therefore “These examples are not easy”.

Explanation / Answer

1. If I work a logic example without grumbling, then it is one I understand. 2. If the arguments are arranged in regular order, then they are not these examples and they are not like the ones that I am used to. 3. If my head aches, then the example was not easy. 4. If the arguments are not arranged in regular order like the ones I am used to, then I can't understand the examples. 5. If I grumble at an example, then it gave me a head ache.

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