1. Statements: All mangoes are golden in colour. No golden-coloured things are cheap. Conclusions: All mangoes are cheap. Golden-coloured mangoes are not cheap.
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By: guest on 02 Jun 2017 01.28 am
Clearly, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No mango is cheap'. Since all mangoes are golden in colour, we may substitute 'mangoes' with 'golden-coloured mangoes'. Thus, II follows.