Shalom! I couldn't help wondering about the gemara that says that the Shunamit said Elisha was kadosh. My question:

(a) For the man d'amar who says that no fly approached his table, this would be
a sign that he was certainly a tzadik, someone on a higher level than the
average erliche Yid.

BUT for the other man d'amar who said she set a sheet of linen and saw no KERI, how is this particularly a sign that he was on such a high madrega? Not having a fly at he table is certainly a sign of a much higher madrega than not seeing keri, since even "relatively lowly Jews (in those days)are not likely to see keri. So why would the absence of keri mean he was a kadosh? These examples don't seem to be comparable...

(b) Furthermore, was she in the habit of inspecting men's sheets who were
staying overnight without their wives?? Why was this such a significant
criteria for her?

(c) Also, what does the gemara mean to say Gehazi HELD hod yafeha, EVEN by
accident? This would (lechoyra) seem absurd as a criteria for determining
the kedusha of Elisha compared to Gehazi. How could a Tzaddik - a navi -
have a servant who would do such a thing (HOLD) in the first place, even by
accident? Holding is much different than merely touching by accident.

What is the gemara saying?

Thanks.