Terminator Salvation fails for a number of reasons. It’s about 30 minutes too long, and all the dullest, most senseless, least compelling sequences come in the second half of the film, leaving the viewer with a sour taste. That’s a shame only because there are some pretty nice action set pieces in the first half. But what stands out about the film is its ham-fisted attempt to reflect on the classic science fiction question, “What makes us human?”

You see, in Terminator lore, machines are bad and humans are good. So when Salvation attempts to break new ground, it does so by introducing a character that is partly human and partly machine. This is then supposed to provide a philosophical quandary both for hybrid (“what am I?”) and for those who interact with it (“what is it?”). (Apparently this has become the standard fourth-film-in-a-franchise question, since Alien: Resurrection posed the same question, but with alien-human hybrids instead of machine-human hybrids.) Perhaps in more deft hands this could have been an interesting question for a film. Instead, it is in the hands of McG (Charlie’s Angels, Charlie’s Angels: Full Throttle), the pens of John D. Brancato & Michael Ferris (Surrogates, Catwoman), and the grunting of Christian Bale (Reign of Fire, Newsies).

Not having anything interesting to say about the interactions of humans and machines, the filmmakers decided to blow stuff up. Personally, I am in favor of blowing stuff up on screen. It’s fun to watch. Maybe not in the second hour, when the filmmakers have lost track of who we care about and why, so we have no reason to root for any of these characters to survive. We just hope our bladders survive the two hours it takes to finish the film. But not content to blow stuff up, McG, Brancato, and Ferris also decide that they should say something. This is a science-fiction film, after all, and therefore must have pretenses to philosophical navel-gazing.

So here is what they do. They create a character that is partly human and partly machine. Half the film’s heroes argue that the hybrid is fully human, and the other half argue that the character is fully machine. Apparently, the writers decided that there would be added emotional resonance if every person in the film was an idiot. This is called “screenwriting.”

As a philosopher (yes, I really do have a postgraduate philosophy degree), one thing I try to do in exploring difficult questions is start with the facts. Applied to this film, in wondering what we should think of a human-machine hybrid, and important fact to consider would be this is a human-machine hybrid. Apparently, this never occurred to anyone involved with the making of this film. They decided that it is much more interesting to ask “Is it fully human?” or “Is it fully machine?” In other words, they could never reach the part where they actually do some philosophical reflection, because they are too stupid to acknowledge the single most basic fact that the entire film is built around. Somewhere between deciding to make a film that introduces a human-machine hybrid and actually making that film, they lost track of that single basic idea.

Now, it would be wrong to say the movie fails because of some intellectual fault in the film. As an action spectacle, this film fails because it is boring. But sometimes boring science fiction films can be saved by the interesting questions they address. This is why we still watch 2001: A Space Odyssey and Solaris. And it is also why you should watch Moon, the low-budget space flick that nobody saw last year. Better acting, a more compelling plot, and an interesting question at the center (albeit one that is raised to explore psychological and emotional elements rather than strictly philosophical implications). While I don’t think Moon is an excellent film, I can guarantee that you won’t leave it with that gross, McG-y taste in your mouth.