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The Last Conversation (illustration)
FILE No.24Unsolved

The Last Conversation

Difficulty ★★☆about 4 minContradictory TestimonyReading words strictlyChecking testimony against records
The estate goes to the grandchild who spoke last with the old man. Check the accounts against the records.

Case Record

A wealthy old man died, and his four grandchildren gathered at the mansion. The will said:

"I leave all my property to the grandchild I last spoke with."

The four grandchildren each said:

Satoshi: I spoke with him by phone at 7 p.m.
Midori: I met him and spoke with him in person at 8:30 p.m.
Hiroshi: I visited his room at 9 p.m., but he did not answer when I called.
Waka: I visited at 10 p.m. and he said, "I’m going to sleep now."

The doctor found that the old man had died before 8:45 p.m. Also, the phone records show a message left from the old man to Satoshi’s voicemail at 8:40 p.m.: "Satoshi, I leave the rest to you."

No other conversation that day has been confirmed besides the four accounts and the records.

Your question

Which grandchild satisfies the condition of the will?

Case Files

Timeline

  1. Spoke with Satoshi by phone (his account).
  2. Spoke with Midori in person (her account).
  3. Voicemail left for Satoshi (record).
  4. The old man dies (doctor’s finding).
  5. Hiroshi visits; no response (his account).
  6. Waka visits and says he said “I’m going to sleep” (her account).

Hints

If you get stuck, open the hints one at a time, in order.

Open hint 1

The latest account is not necessarily correct.

Open hint 2

How do you treat an account later than the time of death?

Open hint 3

Is a voicemail a record of exchanging words on the spot?

Solve It

Your question

Which grandchild satisfies the condition of the will?

Choose the answer closest to the truth.

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The Truth

Midori

The answer is “Midori.”

The message left at 8:40 p.m. was a voicemail to Satoshi. It records the old man speaking toward him, not a conversation in which they exchanged words at that time. Hiroshi at 9 p.m. heard no reply, and Waka’s account at 10 p.m. contradicts the time the doctor confirmed. So the last two-way conversation that can be confirmed is the one with Midori at 8:30 p.m. In this puzzle, “spoke” is taken to mean exchanging words with each other.

Key Points

  • Check accounts against confirmed records
  • A visit alone is not a conversation
  • A voicemail is a one-way recording

Why people get fooled

After choosing the latest visit, you mistake the 8:40 recording for the “last conversation.”

Similar tricks

  • Reading the condition word strictly
  • Checking a timeline against testimony

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If you view the truth, this case will not count as solved on your own. Open it anyway?

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