Used when analyzing hints to form a logical conclusion, typically in a problem-solving scenario. I could deduce that she was upset from her short replies.
Pro Tip 2/3
Not Guesswork
Implies a thoughtful conclusion based on evidence, not just a random guess. He didn't just guess; he deduced the answer from the evidence.
Pro Tip 3/3
Everyday Use
Can also be used in casual contexts, not just formally or officially. Can you deduce what I bought from the change left over?