勘違い

1. Origins, structure, and basic meaning

• Structure: 勘違い (かんちがい) is an action noun for mistakenly understanding a fact or person as something else.
• Basic usage: 時刻を早いと勘違いする mistakes the meeting time as an hour earlier, while 別の人だと勘違いした confuses a person because of a similar name.

2. Common pitfalls and similar expressions

• Quoted mistaken judgment
  • In 早いと勘違いする and 別の人だと勘違いする, the material before と is the mistaken judgment. The verb does not mean deliberate lying or simple failure to remember.