"Serious" doubts is correct. Very, very, series doubts on Kerry's purple hearts (he literally begged for the first one).
BTW: Purple Hearts were turned down by the "real heroes."
My brother turned down his first two simply because he felt he had not been wounded badly enough (direct gunfire while on USMC Recon missions and also didn't want to alarm "mom" back home that he was getting "scraped up" any.
Shows you the kind of worm Kerry was.