Global BEM conference 2019 - Sunday

This week I have watched the video stream of the Global BEM 2019 conference that was recorded on Sunday, because I could not be there on that day. 
This day the presentations were focused on the real scientific explanations behind the so called exotic technologies. At least in the second half of the day, it became quite the roller coaster ride in terms of scientific research. 
A few times during the conference the same fundamental question came up: 
What is electricity? A tough question to crack it seems. But it is crucial to answer this question before you can even start to understand what technology behind the question and answer is. In other words; Before you can build an internal combustion engine, you need to know everything about the fuel you are going to use. 
Will there be an answer to this question? Well, if you allow me to take you with me on this roller coaster, you will find out.