This brings up something I've been pondering.

Synthetic vision systems are now becoming available for ASEL.

All well and good but my concern is that if a glass/SV system displayed erroneous attitude info to a PPL I think it is all but guaranteed that he would auger in. It's hard enough to analyze a steam gauge instrument failure, and even harder if a wide-screen PFD is giving bad info....but add in the SV reinforcing what the glass AI is telling you and even chuck yeager would have a hard time. People tend to revert to visual cues...the bigger the better.

At least in big airplanes we have two separate systems which automatically cross-check each other. I wonder what kind of redundancy/error-detection those low-end glass systems have?