Bissoy.com
Doctors Medicines MCQs Q&A

The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: No Boat is Ship. All Ship are Stream. Conclusions: I. No Stream is Boat. II. Some Stream are Boat.

The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: No Boat is Ship. All Ship are Stream. Conclusions: I. No Stream is Boat. II. Some Stream are Boat. Correct Answer Either conclusion I or II follow. 

Concept:

  • The neither-nor case is applicable when both the conclusions are false, whether definite or not. However, if the keywords of complementary pair are given, we will have to check if the conditions of either-or are applicable or not.
  • The either-or case is applicable for a pair of statements only if either of the following pair of keywords is used AND only if the following conditions are satisfied:

Keywords:

  1. All and some not
  2. Some and no

Conditions:

  1. The same elements are used in the two conclusions. For example, in this case, the elements jungles and malls are common to both conclusions.
  2. Both conclusions should be possibilities. That is, they should be false because the conclusion is possible but not definite.

Then, the pair of conclusions are considered as complementary pairs.

Explanation:

In the given question, the keywords provided (All and some not) satisfy the concept of the Either-or case.

Therefore, we rule out option 4.

The least possible venn diagram for the above statements is as follows:

[ alt="F1 Kanchan Madhuri 14.06.2021 D1" src="//storage.googleapis.com/tb-img/production/21/06/F1_Kanchan_Madhuri_14.06.2021_D1.png" style="width: 213px; height: 90px;">

For conclusions:

I. No Stream is Boat → False (as no boat is ship and all ship are stream given which part of stream are ship can never be boat but no stream is boat, it can be a possibility but not definite. We can not say about it definitely)

Case 1:

[ alt="F1 Puja Madhuri 21.09.2021 D8" src="//storage.googleapis.com/tb-img/production/21/09/F1_Puja_Madhuri_21.09.2021_D8.png" style="height: 103px; width: 224px;">

Case 2: 

[ alt="F1 Puja Madhuri 21.09.2021 D9" src="//storage.googleapis.com/tb-img/production/21/09/F1_Puja_Madhuri_21.09.2021_D9.png" style="width: 224px; height: 112px;">

Thus, Conclusion 1 will be definitely false.

II. Some Stream are Boat → False (It is a possibility but not definite. We can not say about it definitely)

Hence, Either conclusion I or II follows.

Related Questions

The statements below are followed by two conclusions labeled 1 and 2. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statement. Give answer: (A) If only conclusion I follows (B) If only conclusion II follows (C) If either I or II follows (D) If both I and II follow. STATEMENT: Violet colour has short wavelength. CONCLUSION 1: The sky is blue in colour. CONCLUSION 2: The Violet colour is visible in the lower end of rainbow.
In each of the following question below are given some statements followed by some conclusion, Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements, seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements, Statements: I. All pages are yellow. II. All yellow are newspapers. III. Some newspapers are national. Conclusions: I. Some national are yellow II. Some newspapers are pages. III. No page is national.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: Some Math is English. Some English is Hindi. Conclusions: I. Some Math is Hindi. II. Some English are not Hindi.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: Some Birds are Cows. Some Cows are Dogs. Conclusions: I. Some Birds are Dogs. II. Some Dogs are Cows.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: Some Files are Data. All Documents are Data. Conclusions: I. Some Files are Document. II. Some Data are Document.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: All Cars are Speakers. Some Speakers are Windows. Conclusions: I. Some Cars are Windows II. Some Windows are Speakers.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: All Obama are Trump. Some Trump are Clinton. Conclusions: I. Some Obama are Clinton. II. All Clinton are Trump.
The statements given below are followed by two conclusions labeled I and II. Assuming that the information in the statement is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: All Pigs are Ducks. Some Ducks are Hens. Conclusions: I. Some Hens are Ducks. II. All Hens are Ducks.
The statements below are followed by two conclusions labeled I and II. Assuming that the information in the statements is true, even if it appears at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: 1) Some owls are horses. 2) Some horses are hares. Conclusions: I. Some owls are hares. II. Some hares are owls.
The statements below are followed by two conclusions labeled as I and II. Assuming that the information in the statements are true, even if it appears at variance from generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: Some poems are poetries. Some poems are stories. Conclusions: I: Some poetries are poems. II: Some stories are poems.