Even if you only have wild speculation, anything could help, as it would bring new guesses to light. As long as you put some thought into it unlike Frodo, who was wildly throwing out guesses on his executioner kick, then I suppose anything that anyone says. Hell, it could even be just some thought on what the current lynch is, just make sure you're alive and kicking, rather than saying nothing and only hammering lynches, as that will get you suspected like I just did.