deduction
US /dɪˈdʌk.ʃən/
UK /dɪˈdʌk.ʃən/

1.
the action of deducting or subtracting something
:
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The company made a deduction for taxes from his salary.
•
You can claim a deduction for business expenses.
2.
the inference of particular instances by reference to a general law or principle
:
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Sherlock Holmes is famous for his powers of deduction.
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Through careful deduction, they solved the mystery.