Most of Trump's brain is a neuron firing based on a thing he saw long ago that might be related to the topic in some way. The rest of the conversation is backfill to connect those dots to whatever the main topic is.
Im pretty sure it’s a lot more straightforward than that. There are already pipelines bringing water from the mountains down to Southern California. If there’s a lot of excess water in mountains farther north, how different can that be?
— someone with no concept of the distances, changes in elevation, complexity of engineering, ridiculous cost, impact on environment, etc