Exactly. There are two major questions: either the models are right or they are wrong, and either we successfully curb emissions on a very large scale (action) or we do not (inaction). This gives us four outcomes:

1. Models are Right + Action = huge spending on energy but we save the planet

2. Models are wrong + Action = huge spending on energy that otherwise would be spent on defense, etc. but we are left with a renewable energy infrastructure.

3. Models are wrong + inaction = little money spent on new power sources, left with fossil fuel-based infrastructure. When fossil fuels run out in 100-200 years, have to build renewable infrastructure to replace it.

4. Models are right + inaction = little money spent on new power sources, left with fossil fuel-based infrastructure. When fossil fuels run out in 100-200 years, have to build renewable infrastructure to replace it. Also, dramatic weather changes, widespread famine, etc.

Does inaction make sense even if the models are wrong?