I want to say yes, I believe they can win this—not only because I want them to win (obvs), but because I felt the opposite when down 0-2 to Chicago and they proved me wrong.
On the other hand, I feel like if I declare my unreserved belief in this team at this point, they're gonna pull the rug out from under me.
Boston had a golden opportunity to step on Washington's throat in the second quarter and put the game away early but didn't do it; at that point, I knew that this team still had a lot of learning and growing to do, but nothing unreasonable—they're a young team, after all.
But when they got their doors blown off in the third quarter, giving up yet another huge run, that told me that this is more than just a relatively young, inexperienced team, but instead is a team that may just not have it (however you define it).