Read the following sentences carefully, examine their modes of r

Read the following sentences carefully, examine their modes of reasoning and comment on whether the reasoning is sound. If not, discuss in pairs how you would improve it.
Every time you get a call from some unknown number, you find a telemarketer on the other side of the line. It makes you conclude that if you receive an unknown call, it is most likely to be a telemarketer.
【正确答案】：Unsound deduction. Just because you have received calls from unknown numbers and they are from telemarketers does not mean that all calls from unknown numbers are from telemarketers.