Posting write-only. EDIT I am no longer write-only
Recall Harry's transfiguration power:
Last week, when the graduating Ravenclaws were discussing their N.E.W.T. scores, Harry had overheard that upper-year Transfiguration practice involved several 'shaping exercises' that relied more on control and precise thinking than raw power; and Harry had promptly set out to learn those, whacking himself hard on the forehead for not trying to read all the later-year textbooks earlier. Professor McGonagall had approved Harry doing a shaping exercise that involved controlling the way in which a Transfiguring object approached its final form - for example, Transfiguring a quill so that the shaft grew out first, then the barbs. Harry was doing an analogous exercise with pencils, growing out the lead first, then surrounding it with wood and finally having the eraser form on top. As Harry had suspected, focusing his attention and magic into a particular part of the pencil's ongoing transformation had proven similar to the mental discipline used in partial Transfiguration - which could indeed have been used to fake the same effect, by partially Transfiguring only the outer layers of the object. This way was proving relatively easier, though.
With this Harry can:
Dumbledore can cast the Patronus wordlessly (chapter 57). Maybe Harry can too, and
Of course, there are lots of solutions if you allow Harry to have done stuff off-camera. "Cedric, if I don't meet you at 11:59 tonight carrying a mayonnaise-infused gerbil, please use your time turner to cause a paradox". Harry could turn into his hitherto unseen animagus form ETA which might be a peregrine falcon, the fastest of birds.
And the rest of you, you must fire if Harry Potter tries to run, even if it means striking at your fellow Death Eaters.
Useful
Evidence we have the Harry doesn't
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 113.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
IMPORTANT -- From the end of chapter 113: