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Today is the 276,300th day of my daily watch.
Issue. Mr. Black, Mr. White, Mrs. Coffey, Mr. Ambs *** Kelly, and Miss Earnshaw were employees of a microcredit company, and their positions were manager, assistant manager, teller, stenographer, teller, and secretary, but not necessarily in that order.
The assistant manager is the manager's grandsonThe teller is the son-in-law of the stenographer, Mr. Black is a bachelor, Mr. White is 22 years old, Ambu*** is the stepsister of the teller, and 6 Mr. Kelly is the manager's neighbor.
What is everyone's position?
Solving. The first thing to do is to make a list of the information in the question.
After that, according to the 6 pieces of information given, analyze and judge them one by one, eliminate the impossible, and finally determine each person's position.
If you have time, you can try the solution yourself first, and then watch my analysis.
According to , the assistant is a grandson and is a male, excluding three women.
According to , the cashier is a son-in-law and is a man, excluding three women.
According to , Launch Black is not a cashier.
According to , White is 22 years old and could not have grandchildren, launching that he is not a manager.
According to , the launch of Ambu is not a count.
According to , Launch Kelly is not the manager.
According to the 6 pieces of information, the preliminary judgment is added to **.
According to , the manager has a grandson and must have been married, so it's not two young ladies.
According to , shorthand has daughters who are also married, and they are not two young ladies.
At this point, it has been established that Miss Amber is not a manager, assistant, cashier, stenographer, and counter, so she is the secretary.
Once Miss Amber was determined to be the secretary, the others were not secretaries, so it was determined that Miss Earnshaw was counted.
According to , Mr. Black is single, meaning he is not married, so not the manager and shorthand, it is determined that he is an assistant and at the same time Mrs. Coffey is the manager.
According to , Mr. White was 22 years old and could not have had a daughter, so he was not a shorthander, but a cashier, while determining that Mr. Kelly was a shorthand.
I did this question twice, the first time I only determined the position that everyone could not be based on the information, but did not determine the position of one person, which led to the subsequent progress not being carried out.
It wasn't until some time later, when I tried to solve the problem for the second time, that I realized the information contained in the name, since the distinction between "Mrs." and "Miss" was made, then there was an implicit message.
Realizing this, the reasoning after that is logical.
Self-study logic, welcome to communicate**.
I'm Zheng Yi, and I'll continue to make progress with you.
Portions of the text are quoted from Owen in Introduction to Logic (15th ed.). m.Ke Pi (author), Chinese Renmin University Press, November 2022.