There's a wide range of railroad knowledge (or lack thereof) that is published in the Real Trains Forum, ranging from very naive assumptions, through what somebody heard from another railfan, to what somebody read on Wikipedia or in a railroad magazine, to first-hand knowledge.
This is the Real Trains Forum, and we should all make an effort to be accurate and separate opinion from fact, to the degree possible for each of us. And it's always okay to ask questions.
The EMD model designation topic has been addressed here many times, and, to give benefit of the doubt to innocent posters who bring out the "Roundhouse Foreman with a large wrench in his hand" in our colleague, Hot Water, model manufacturers have led some down the path by using erroneous EMD model designations in their catalogues.
Let's all try to avoid putting EMD dashes where they don't belong, referring to prototype multiple unit locomotive consists as lashups, and referring to tank cars as tankers. There's nothing wrong with not knowing something about railroading, but, if we all strive to learn -- and we can all learn, even those with years of railroad experience -- we can maintain a high level of accuracy on the Real Trains Forum, a place where accuracy is important.
And drawing Hot Water out of the Roundhouse Office to get compliance, is actually very prototypical. During most of the 20th century, real railroad knowledge was, more often than not, gained by negative reinforcement from Roundhouse Foremen, Engineers, Conductors, Yardmasters, and Officials. You did not nurse hurt feelings. You made sure never to do that (whatever it was) again.
Hot Water and I and the other professional railroaders who post here have all been humbled by gruff old men who make Hot Water look like a florist by comparison. (He is actually a nice fellow.) None of us knew much when we began working in the railroad industry, and we all corrected our mistakes and became better railroad men.