Deductive Reasoning and Inference Rules
A prominent class of theorists suggests that deductive reasoning is dependent upon a specific framework of inference rules.
Nature of Inference Rules
These theorists argue that the rules governing deduction are formal. This means the validity of a deduction depends on its logical structure, irrespective of the actual meaning or content of the statements involved.
Analogy to Logical Calculus
The functioning of these formal inference rules is likened to the operations within a logical calculus. Logical calculus provides a system where symbols and their combinations are manipulated according to defined rules to derive conclusions, mirroring the formal process of deductive reasoning.
Thus, deduction is understood to rely on formal rules of inference, comparable to those found in logical calculus.
Important Questions from Reasoning
'Neigh' is related to 'Horse' in the same way as 'Bleat' is related to ____
Three of the following four letter-clusters are alike in a certain way and one is different. Select the odd one.
Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R) :
Assertion (A): Substance is always the subject of all predicates.
Reason (R): Substance is self-existent and self-conceived.
In the light of the above statements. choose the correct answer from the options given below:
Given below is a question followed by three statements. Identify the statements that are necessary to answer the question.
Question: What is the percentage profit gained by a vendor when he sells an article?
Statements:
(i) He gives a 10% discount on the marked price.
(ii) He would have earned 25% profit if he did not give any discount.
(iii) The cost price of the article is Rs. 8000.
Choose the correct option from those given below :
Given below are two statements:
Statement I: Human reason has this peculiar fate that it reaches at a stage when it can neither answer certain questions nor can it ignore such questions.
Statement II: Human reason, by its own nature, is not competent to resolve certain questions concerning the ultimate reality.
In light of the above statements, choose the most appropriate answer from the options given below
