I couldn't fully explain what I meant in the title so please read my post to get the full context. I recently saw Bumblebee with some people who are completely unaware of Transformers and know nothing about it. After the movie I got asked a lot of questions like: "Can transformers only scan vehicle modes that are their same color scheme?" "Who can be a prime?" "Was Optimus always a Prime?" "Do Transformers age or grow up?" I'm sure we've all gotten questions like this in one form or another but I found myself answering a lot of the time saying: "It depends what continuity you're talking about." Transformers is so vast and has had so many different approaches to these basic questions that it's sometimes hard giving a concise answer to someone who just wants the short answer. Is the default "canon" the G1 cartoon or is it more broad like the Aligned Continuity? Just curious to know if there is a generally agreed upon head canon that most of us use to explain Transformers to non-fans.