Logical Reasoning - Logical Deduction - Discussion
In each of the following questions, three statements are given followed by four conclusions numbered I, II, III and TV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements: No table is fruit. No fruit is window. All windows are chairs.
Conclusions:
- No window is table.
- No chair is fruit.
- No chair is table.
- All chairs are windows.
No table is fruit. No fruit is window.
Since both the premises are negative, no definite conclusion follows.
No fruit is window. All windows are chairs.
Since the middle term 'windows' is distributed twice and one premise is negative, the conclusion must be particular negative. So, it follows that 'Some chairs are not fruits'.
As per the rules, when both the premises are universal, the conclusion must be universal. Please explain.
If you look here then Middle Term "Windows" is distributed twice.
As per rule, when the middle term is distributed twice, then the conclusion should be Particular.
Hence "Some chairs are not fruits".