Exact(8)
Lodge explains free indirect style by contrasting three simple sets of sentences: 1) "'Is that the clock striking 12?' Cinderella exclaimed.
In one sense, decidability is a property of sets (of sentences): that of being subject (or not) to mechanical methods by which to decide in a finite number of steps, for any closed sentence of a given formal system (e.g., of N), whether it is true or not or as a different question whether it is a theorem or not.
After all, at best these arguments show that certain sets of sentences (beliefs, etc).
He identifies theories with sets of sentences, not with sets of sentence-meanings (propositions).
Second, we define multiple revision operators with respect to sets of sentences (representing explanations), giving representation theorems.
There are three disjoint sets of sentences corresponding to the three different emotions.
And some philosophers (e.g. Eklund 2002) have argued that there are inconsistent sets of sentences that satisfy this condition.
It is noteworthy that this way of putting things is contentious and possibly misleading; after all, on a technical understanding theories are sets of sentences.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com