Write the correct sentence

None of us are perfect. = None of us is perfect.

The original sentence contains a common grammatical error related to the use of 'less' and 'fewer'.

    
• Fewer: Used for countable nouns (items that can be counted individually), such as 'people', 'books', 'cars', 'students'.
    
• Less: Used for uncountable nouns (mass nouns or abstract concepts that cannot be counted individually), such as 'water', 'time', 'money', 'information', 'sand'. It can also be used for singular countable nouns when referring to quantity or degree rather than individual units (e.g., "less than a mile").

In the given sentence, 'people' is a countable plural noun. Therefore, the correct comparative adjective to indicate a smaller quantity is 'fewer'. The phrase 'no fewer than' correctly implies that the number of people was at least one thousand, emphasizing the large quantity of countable items.