Item 1:

I hate mankind, for I think myself one of the best of them, and I know how bad I am.  – Joseph Baretti, quoted by James Boswell, 1766, commonly misattributed to Samuel Johnson


– Structural Fallacy: Fallacies of  presumption ( reasoning in a chain with some)

– Analyze:

I am involved in  mankind

I am bad

Therefore The  mankind are bad

Joseph Baretti is wrong in his conclusion that  the whole mankind are bad just because he is one of them and he is bad.  Actually, not everyone is bad. The human being are full of kindness and every year a lot of people do charity.

Hasty generalization: What’s true for a member is true for the whole group


Item 2:

Không có hoa hồng, không có tinh yêu.

Không có người mẹ không có anh hùng


– Content Fallacy: Fallacies of relevance

– Analyze: 

Weak analogy

Item 3:


– Content fallacy:  Falacies of presumption ( reasoning in a chain with some)

– Analyze: 

Penguins are black and white

Some old TV shows are black and white

Therefore, some penguins are old TV shows

This is an weak invalid argument. The conclusion is wrong definitely.


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