Please give me some examples of sentences this,What is a universal claim?

Is this correct?
Mary is the town clerk.

2 answers

It is correct, but it is not a universal claim.

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All whales swim... could be an example of a universal claim.

However, you need to realize that unless you have checked every whale in the world, there is a possiblity that the basis might be untrue. This is a problem with universal claims.