I'm describing the results of an experiment I did, and I'd like to find a word to put in the blank (I'd also accept alternative ways of phrasing this statement generally):
We ran a computer simulation, using a very simplified model. The simulation predicted X. When we performed the experiment, we saw that the result was actually Y, showing that our simplified model was indeed _____.
In a different context, I'd normally go with "flawed" or "incorrect", but I'd prefer to cast this in as neutral a light as possible. After all, I didn't do anything wrong; I knew that using a simplified model would likely mean the results of the actual experiment would be somewhat different. If there is a single word that captures the idea "paints an incomplete picture", I'd probably like that.