2023 National Examination Daily Practice (Logical Judgment) (7.7)

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1. In a criminal case of theft, the police arrested four suspects A, B, C and D and interrogated them. They say this:

This is B's case.

B: Ding and I worked on this case together.

C: Ding is a criminal.

D: I didn't commit this case.

Only one of the four sentences is a lie. If the above is true, which of the following is true

A. It is A who lies and C who commits the crime.

B. C is the liar and B is the criminal.

C. It is Ding who lies, and B and Ding who commit crimes.

D. B is the liar and B is the criminal.

2. For the recruitment of a company, Party A, Party B and Party D attended the interview. After the interview, the four people predicted the following results:

A said: all four of us can enter the company;

B said: I can't get into the company;

C said: neither B nor I can enter the company;

Ding said: Not everyone can enter the company.

The results show that only two people's predictions are correct. These two people are:

A.a and c B and D. C. B and d.c.d.

3. Some researchers claim to have found a brand-new method to control the blood sugar concentration of diabetic patients. Caffeine is the key to this new treatment. They tested mice with diabetes and found that when mice ingested caffeine, their ability to control blood sugar concentration was better than that of mice that did not ingest caffeine. Based on this, the researchers believe that the method of controlling the blood sugar concentration of diabetic patients by injecting insulin in the past can also be replaced by caffeine intake in the future.

If correct, which of the following can best support the above conclusion:

A the above research results have been published in top international medical journals.

B. It is very troublesome for diabetics to inject insulin every day.

Studies have shown that caffeine can reduce the risk of rectal cancer and melanoma.

Caffeine absorption by mouse and human kidney cells can promote insulin production.

Reference answer

1, answer C. analysis: according to the stem of the question, what C and D say is contradictory, and there must be a truth and a falsehood, so the only lie is between C and D, so what A and B say must be true. According to B, B and D commit crimes. From this point of view, what Ding said is a lie. So the answer is C.

2. Answer B. Analysis: As can be seen from the stem of the question, the words A and D are contradictory, and there must be one truth and one falsehood. According to? Only two people's predictions are correct? There must be a truth and a falsehood in what B and C are known, and the authenticity of B and C is uncertain. It can be assumed that if C is true, then B is also true. There must be a truth and a falsehood in the words B and C? Contradictory, the hypothesis is not true, so what C said is false, and what B said is true, that is, B can't enter the company. It can be seen that A's words are false, Ding's words are true, and B and Ding are the correct predictors. Therefore, choose B in this question.

3. Answer D. Analysis: The problem is that when mice ingest caffeine, their ability to control blood sugar concentration is better than that of mice that don't ingest caffeine, and it is concluded that the previous method of controlling blood sugar concentration of diabetic patients by injecting insulin can also be replaced by caffeine intake in the future. Item A only shows that the research results are published in the world's top medical journals, and there is no substantive argument, which does not mean that the research results must be correct, which belongs to the appeal to authority and cannot well support the conclusion of the topic and exclude it; Whether the injection of insulin in item B is troublesome has nothing to do with whether caffeine can effectively control the blood sugar concentration, so it is irrelevant and excluded; C rectal cancer and melanoma have nothing to do with controlling blood sugar concentration in diabetic patients, which are irrelevant items and are excluded; Item D shows that any mouse can promote insulin production by absorbing caffeine through renal cells, and then control blood sugar concentration, which means that caffeine intake can replace insulin injection, which supports the conclusion of the problem. Therefore, choose D in this question.