If you can explain something in simple terms you may not understand the complex details. If you hold a complex idea in your head translating that into English

If you can explain something in simple terms you may not understand the complex details. If you hold a complex idea in your head translating that into English can be difficult because part of the process is removing/altering information to fit into existing notions. That is why buzzwords are popular they can take an idea and put it in a relatable concepts for the masses.