The Rules
Copper- behave toward others to elicit treatment you would like (the manipulative rule)
Gold- treat others how you would like them to treat you (the self regard rule)
Platinum - treat others the way they would like to be treated (the PC rule)
There's also the smooth, constant acceleration over a long period -- cometary out-gassing is sudden and short-lived. So to sum it up, it doesn't physically look like cometary out-gassing and it doesn't accelerate the way cometary out-gassing does, but it must be that because it's the only natural phenomenon ever observed to cause acceleration. You really think of that as "easily explainable?" Sure, it's less un-reasonable than "it's a space ship," but come on. The reasonable thinking has to be: "based on observation, that's not a comet, so what else could be causing that acceleration? Yeah, it looks a lot like how a solar sail accelerates, but that's an unreasonably extraordinary conclusion, so what else could it be?"
Somebody really needs to send a spacecraft out there for a close flyby. Because the answer to the question either offers knowledge of a new class of naturally occurring, interstellar, object, potentially changing our understanding of the rest of the galaxy/ universe, or is the most important discovery in human history.
Should I write my congressman? Is it even possible to get a spacecraft out there in the time available?
The Rules
Copper- behave toward others to elicit treatment you would like (the manipulative rule)
Gold- treat others how you would like them to treat you (the self regard rule)
Platinum - treat others the way they would like to be treated (the PC rule)