Answered: Prove its invalidity by assuming the…

Prove its invalidity by assuming the conclusion as false and both premises are true. Some gamblers are happy. Some idealists are not happy. Therefore, no idealists are gamblers.

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

Prove its invalidity by assuming the conclusion as false and both premises are true.

Some gamblers are happy. Some idealists are not happy.
Therefore, no idealists are gamblers.

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I don't understand this. Please Helppppp!!!!
this is a practice question given by the lecturer, hope someone can solve it thank you