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Tomas held out both hands, clearly showing ten digits – eight fingers and two thumbs – and proclaimed 'I actually have nine fingers!' His friend Jerzy replied 'No, you only have eight fingers!'. To prove that he had nine fingers Tomas counted backward on one hand '', then said 'and 4 on this hand makes 9 fingers'. This logic is incorrect because:

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Tomas held out both hands, clearly showing ten digits – eight fingers and two thumbs – and proclaimed 'I actually have nine fingers!' His friend Jerzy replied 'No, you only have eight fingers!'. To prove that he had nine fingers Tomas counted backward on one hand '<br><img src='https://www.fatskills.com/images3/praxiselementary/image_028_054.png'/>', then said 'and 4 on this hand makes 9 fingers'. This logic is incorrect because:






 
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