if thr mechanic says that it will take seven days to repair your car, then it will actually take ten days. The mechanic says, "I figure it'll take a week to fix it." Then you can expect it to be ready ten days from now. I don't understand how this would be deductive reasoning.

a week is 7 days.

Now look at the first sentence.

Kind of a trivial example, but you have to deduce that

He says a week.
I know he takes 10 days when he says 7.
A week is 7 days, so it will take 10.

Deductive reasoning is a logical process of reaching a conclusion based on known facts or premises. In the given scenario, it may not involve deductive reasoning explicitly, but we can use deductive reasoning to understand the statement.

The statement describes a situation where the mechanic initially estimates that it will take a week to repair the car. However, it is then mentioned that if the mechanic says it will take a week, it will actually take ten days.

To understand why it would take ten days instead of seven, we can use deductive reasoning. By analyzing the provided information, we can deduce that the mechanic is likely underestimating the amount of time needed to fix the car.

Here's the reasoning process:

1. The mechanic says it will take a week to fix the car.
2. The statement implies that the mechanic tends to underestimate the time it takes.
3. If a week usually means ten days for the mechanic, then the actual repair time will likely be longer than initially anticipated.
4. Therefore, we can expect the car to be ready ten days from now, instead of the initially estimated seven days.

To summarize, while the initial statement may not be an explicit example of deductive reasoning, we can use deductive reasoning to understand and analyze the situation, leading to the conclusion that it will take ten days to repair the car.