Multimedia makes it really, really hard to lie.
Witness David Cox’s toaster regression. It doesn’t work. We thought it was linear. It isn’t. It isn’t worthless for classroom inquiry. Maybe it’s exponential. But the linear model is a dead end.
If you’re writing the problem in a textbook, though, it isn’t a dead end. You grab some clip art of a toaster. You create a table with values that are linear because who’s going to stop you? Even though the real context isn’t linear, you’re the god of your textbook’s pseudocontext.
Then you fabricate a conclusion that supports the pseudocontext.
For whatever other good it does for problem posing, multimedia keeps you honest. How do you (easily) film pseudocontext? How do you take a picture of a premise that is false? Even harder, how do you take a picture of the conclusion of that false premise in a way that doesn’t belie the premise itself?