One of Mr. X, his wife, their son and Mr. X's mother is an Engineer and another is a Doctor.
1. If the Doctor is a male, then the Engineer is a male.
2. If the Engineer is younger than the Doctor, then the Engineer and the Doctor are not blood relatives.
3. If the Engineer is a female, then she and the Doctor are blood relatives.
Can you tell who is the Doctor and the Engineer?

Lawrence,

Just before your conclusion you state,
If Mom is the Engineer, that violates #3, because she and her hubby must be related.
You had already ruled out Mom as an engineer so this point is moot.
If it had started;
If Mom is the Doctor.. (the only occupation left to address)
the sentence would have finished
...then she is older than her husband.
You would have been in the 'inconclusive' camp.

The natural choice would be the son as the Doctor since we can be 100% sure he is younger than his father.

Posted by Lee on 2003-08-29 00:22:19