Other mistake: When Alice's ship is being chased, she orders her crew heel to port (turn left). Instead, it turns heel to starboard (right).
Alice Through the Looking Glass (2016)
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Directed by: James Bobin
Starring: Johnny Depp, Helena Bonham Carter, Anne Hathaway, Mia Wasikowska
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More mistakes in Alice Through the Looking Glass
Alice Kingsleigh: Time is a he?
White Queen: He is not someone you want as your enemy.
Alice Kingsleigh: Please, sir. The Hatter is in danger.
Time: Young lady, your time is up.
Mad Hatter: This cannot be good.
More questions & answers from Alice Through the Looking Glass
Answer: The way I interpreted the scene is that Mirana subconsciously altered her own memory to convince herself that she had not eaten the tart to avoid the guilt of the resulting accident. This is a real phenomenon, so it's perfectly plausible. If my assumption is correct, this scene shows Mirana realizing for the first time that she is in fact responsible for everything that has happened since due to a single lie she told.
Phixius ★