[figgis]

"likely", "maybe", "possibly" can all be used differently.. Especially if you take it out of context of the rest of the article.

> Man that food sure looks tasty.

> You haven't even tasted it! Why are you saying it's tasty?

There are absolutely no claims that it's an alien artifact. What he is doing is providing reasons for why checking out similar solar visitors is something we need to do.