Testing yourself is fine...grading yourself can be deceitful unless lolipops are present.

Do you think you can be objective enough with you?

Grade on a curve, see if it makes any difference.

I am not really concerned with testing myself as I am other people. I learned from my years in Construction and the many jobs that I worked on that you have to test everyone. This went on for like 5 years when I finally asked someone what was the problem which their weren't any. They only reminded me that you have to test everyone and only then will you know what is really behind certain individuals.
Thinking back on it I can remember how others would sometimes comment about a certain person whom they had thought they knew and were suddenly surprised to find out that they were not what they had originally perceived in character. Sometimes this can be brought about by other sources of influence be it a spouse, job, drug or alcohol abuse or Political affiliation.

I've got a pretty sure fire method for identifying the right thing to do. Pick the answer I want to do the least, that's the one.

Hey now, don't be so hard on yourself...?

Wise plan.