Homosexuals must not be allowed to hold government office. Hence any government official who is revealed to be a homosexual will lose his job. Therefore homosexuals will do anything to hide their secret, and will be open to blackmail. Therefore homosexuals cannot be allowed to hold government office.
The argument is entirely circular; the premise is the same as the conclusion. An argument like the above has actually been cited as the reason for the British Secret Services’ official ban on homosexual employees. One Fallacy of Composition is to conclude that a property shared by the parts of something must apply to the whole.
Some herbs help reduce heat (premise)
Dr. Thanh tea is extracted from 9 kinds of herbs which make body cool (premise)
Dr. Thanh tea help reduce heat (conclusion)
This is an deductive argument with sound and strength. It has two premise which all is completely true. We all know that herbs is very good for health and some of them can make the body cooler. While Dr Thanh tea is made from 9 kinds of herbs which are believed and proved that they can reduce heat inside the body. As a result, when we have heat , drink Dr Thanh tea is a good choice.
Big sisters are the most powerful child in family
Big sisters are more intelligent than any other siblings
Any saying of big sisters is true
I am the big sister
You (Other smaller siblings) must obey my requirement
The argument is weak. It has 4 premises but some of them are wrong. The big sisters are the eldest child in family but it is not right that they are all more intelligent than the others. Moreover, big sisters’ saying are not always true. Therefore, the conclusion that ” You (Other smaller siblings) must obey my requirement” is absolutely wrong.