These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Thirteenth Tale
Fridge Logic: Vida Winter wrote dozens of novels with her non-dominant left hand, in fact used only her left hand for years and years — yet her handwriting never improved beyond a childish scribble?
I thought the letter Margaret received was written with her dominant right hand, ignoring the pain to become the first - and only - thing she wrote with that hand after the fire.