Logical Reasoning
Logical Deductions
3,279 words, 9 sections
Logical Deductions is the third unit of Logical Reasoning in the PMDC MDCAT-2025 uniform curriculum, and its two learning outcomes are predicting new relations from given relations and building new structures from information already drawn. Logical Reasoning is worth 9 of the 180 marks, and this chapter accounts for 23 distinct questions across 17 official papers between 2013 and 2026, set by Balochistan, DUHS, Federal, KMU and UHS at a mean item difficulty of 2.74, with 293 active questions in the practice bank. The weight is almost entirely syllogistic: Syllogisms and Venn Diagrams holds 20 of the 23 questions over 2013 to 2025 and five boards, while conditional reasoning, logical equivalence and one untagged item take one question each. No textbook exists for this subject, so the note is built from the questions that were actually set. A student who has this material can take a small set of statements, draw only the conclusions they force, and recognise the option that has quietly added a fact the premises never supplied.
Every item in this chapter hands over one or more statements and asks which conclusion follows. The word to watch is the stem's own qualification: "which of the following is NECESSARILY TRUE", or "which conclusion follows". A conclusion follows only if it is true in every arrangement of the world that the premises allow. If even one arrangement satisfies the statements while contradicting the option, the option does not follow, however likely it seems.
Two kinds of wrong answer hide behind this. One is the conclusion that could be true but need not be, which the examiner plants because it feels like the natural reading. The other is the conclusion that uses a term the premises never linked, such as carrying one subject into a sentence about another when no premise joined them. Deduction is not about what is plausible; it is about what is forced.
Because 20 of the 23 questions are measured under Syllogisms and Venn Diagrams, almost every item on the paper is a syllogism in disguise, and the same discipline applies to all of them.
7 more sections in this chapter
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