General usage:
* The detective made a deduction based on the evidence found at the crime scene.
* The accountant made a deduction from my income tax for my charitable donations.
* The scientist's deductions led to a breakthrough in cancer research.
Formal usage:
* The deduction of the defendant's guilt was based on circumstantial evidence.
* The deduction of the theorem followed logically from the previous proofs.
* The philosopher used deduction to arrive at his conclusions.
Informal usage:
* I made a deduction that you were going to be late because your car was not in the driveway.
* I couldn't help but make a deduction about her personality based on her choice of clothing.
* After a careful deduction, I realized that the missing key was in my pocket the whole time.