Plan C, than:
All the titles are describing unlikely situations:
1. Gaffers are very rarely confused, especially with regards to their taters
2. There is nothing wrong with the system, so no point in wondering about it
3. Being stalked by petty dwarves is unlikely situation, as A) they were hunted after, not vice versa B) with the Mim, they've died out
4. Wood elves are unlikely to be terrorized at all, quite the opposite
5. There are no forgetful Maiar, they are notorious for their minds' capabilities
So, the thing they all have in common is their absurdity
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There is also Plan D on the way too:
The previous titles, roughly, may be associated with Frodo and his progress with the Ring:
1. Path to adventure started as soon as Frodo become Bilbo's heir, and future Ring-bearer
2. He was getting the hang of governing Bag-End/he was getting the hang of being the Ring-bearer
3. He was faithfull to his task
4. Surely, he was no Took and no fool at that
5. Wisdom of Gandalf was at his disposal
6. Well, his fame was his, no doubt about it
7. He was accepted to Aragorn's court, wasn't he?
8. He took part in Elrond's council as well
9. We all know he took the Straight road
10. Presumably, once in Valinor, he must have set foot on Taniquetil as well
Seeing Gollum as his opposite, and knowing his meanness, and the scale of power the Ring gave him:
1. Invisible Gollum might have been stealing potatoes when he was yet living with his grandmother.
2. He was sure to wonder what happened when he was thrown out of the settlement
3. He surely was known as 'some new horror. bloodsucking ghost' to Mirkwood elves
4.
Not sure about petty dwarves
5. Gandalf says it was a mistake to forget about Gollum, and latest essay in catching him up was just an effort to correct that mistake. It was Gandalf who left Gollum in Mirkwood, and he was 'misplaced', as he managed to escape, either that or he was 'misplaced' in first picuture of situation Gandalf had