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  1. #1
    unpakwon is offline Senior Member
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    proved the rule

    What is the following in red saying in the context?

    The effectiveness of the Salk anti-poliomyelitis vaccine program was measured by statistics gathered in all parts of the country. Isolated cases of ineffectiveness were the exceptions that proved the rule. A talk based on one of these exceptions would not, therefore, convince a parent that the Salk vaccine program would not protect his child.

    Thank you.

  2. #2
    bhaisahab's Avatar
    bhaisahab is offline Moderator
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    Re: proved the rule

    Quote Originally Posted by unpakwon View Post
    What is the following in red saying in the context?

    The effectiveness of the Salk anti-poliomyelitis vaccine program was measured by statistics gathered in all parts of the country. Isolated cases of ineffectiveness were the exceptions that proved the rule. A talk based on one of these exceptions would not, therefore, convince a parent that the Salk vaccine program would not protect his child.

    Thank you.
    Have a look here: Exception that proves the rule - Wikipedia, the free encyclopedia
    and here: The exception that proves the rule

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