- Renewable is the opposite of nonrenewable
- Something cannot have two opposite properties
- Hence, something cannot be renewable and nonrenewable

- Something cannot be renewable and nonrenewable
- Fossil fuels are a nonrenewable resource
- So, fossil fuels cannot be renewable

- Renewable is a property of resources
- If something cannot have a certain property then something else with that property is not that something
- So, if one resource cannot be renewable then another resource that is renweable is not that one resource

- Fossil fuels cannot be renewable
- If one resource cannot be renewable then another resource that is renweable is not that one resource
- Therefore, if something is renewable then that something is not a fossil fuel

- If something is renewable then that something is not a fossil fuel
- Wood is a renewable resource
- So, wood is not a fossil fuel

So, wood is not a fossil fuel
Question
Which is NOT a fossil fuel?

Context
- Wood is a renewable resource 
- Fossil fuels are a nonrenewable resource 
- Renewable is the opposite of nonrenewable 
- Something cannot have two opposite properties 
- Renewable is a property of resources 
- If something cannot have a certain property then something else with that property is not that something