A friend just asked me a question that I frankly don't know the answer to about ellipses, so I figured asking for help here would be a good idea. In dialogue, is there a grammatical rule against a character starting his dialogue with ellipsis to indicate a pause of sorts? Something like this: "So, do you know who the murderer is?" "...Yes." Without the ellipsis, the dialogue would read like this: "So, do you know who the murderer is?" Detective Einstein paused for a moment, before saying, "Yes." It's not really a huge issue, but since I have never tried writing like that, I honestly got no idea on what the grammar rules are for something like that. I'd assume it violates some sort of rule as it's not something I can recall seeing in books very often, but then again, you never know. Thanks in advance for your replies.