Just to compliment and complement Itamar's excellent suggestion, here is how that would look to the student...
Joseph
It's great to train future medical doctors to be able to answer hundreds or thousands of questions.
Next time I go to see my own doctor I'll try to ask him one hundred questions about my health. Not sure he doesn't kick me out long before I reach the 100 mark, though.
Dr. Joseph (PhD)
Jean "The only thing I could not modify was the Respondent Eligibility Field (but it doesn't seem to matter for what we are trying to do)."
Go to Update this Questionnaire button -> Override permissions tab
and select the role(s) for which you want to change permissions for the Complete and submit a questionnaire feature.
Joseph
Attention, Conversion Thingy 2 n'est pas gratuit:
if you're employing the software as part of an institutional shift to Moodle, and are deploying in a production environment the files that were generated by ConversionThingy 2, you must make a payment according to what the conversions are worth to you.