[STRIKE]i[/STRIKE] Is it [STRIKE]true[/STRIKE] correct/appropriate/acceptable to use "might" in the question below?
"[STRIKE]w[/STRIKE] What might put fingerprinting on unreliable theoretical ground?"
Yes
or should [STRIKE]i[/STRIKE] I use "could" or "will" instead of it?
You can. In this particular example, there is little practical difference in meaning between 'could' and 'might', but 'will' expresses greater certainty.