When a person makes an opposing claim, this is usually known as a counterclaim.
What is a Claim?
This refers to the statements and assertions that are made about a particular thing that might or might not be true.
Hence, for example, if a person says that the US is the most literate country, this is a claim that may be true or not, but he needs to provide supporting details such as statistical data to validate the claim.
Read more about claims here:
https://brainly.com/question/2748145
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