Logical syllogism — determine which conclusions follow beyond doubt. Statements: 1) Some tables are TV. 2) Some TV are radios. Conclusions: (1) Some tables are radios. (2) Some radios are tables. (3) All the radios are TV. (4) All the TV are tables.

Difficulty: Medium

Correct Answer: None of the four

Explanation:


Introduction / Context:
This question examines intersection reasoning with two “Some …” premises. From two partial overlaps we cannot assert a definite overlap between the first and third sets unless forced by data.


Given Data / Assumptions:

  • Some tables ∩ TV ≠ ∅.
  • Some TV ∩ radios ≠ ∅.
  • No universal (All …) statement is given.


Concept / Approach:
With “Some A are B” statements, the overlapping subsets can be disjoint within B unless specified otherwise. Therefore, we must avoid assuming transitive overlap across two separate “Some …” facts.


Step-by-Step Solution:
(1) “Some tables are radios” — not compelled. The TV members that are tables may be different individuals from the TV members that are radios. (2) “Some radios are tables” — logically equivalent to (1) by commutation; equally not compelled. (3) “All the radios are TV” — not given; only some TV are radios. (4) “All the TV are tables” — not supported by the partial overlap of tables with TV.


Verification / Alternative check:
Construct a counterexample: Let TV = {t1, t2}; tables∩TV = {t1}; radios∩TV = {t2}. Then both premises are true, but there is no radio that is a table, and neither universal conclusion holds. Hence none of the four conclusions is necessary.


Why Other Options Are Wrong:
Options claiming any of (1)–(4) assume more overlap or universality than warranted by the premises.


Common Pitfalls:
Treating “Some … are …” as if it were transitive. Remember, “some” statements rarely chain deterministically.


Final Answer:
None of the four

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