Assalamualaikum and heyyy.
From my rookie's point of view, Medicine has always been a field that plays with certainty, suspicion and statistical figure. And through many years of meddling in diseases and mortal affairs, humans finally came up with a range of possible diagnosis merely by a glimpse of the presenting symptoms.
"Rectal bleeding means colon cancer until proven otherwise."
"Headaches are subarachnoid haemorrhages until proven otherwise."
"New onset nystagmus in adult is MS until proven otherwise."
"All women are pregnant until proven otherwise.."
A very high index of suspicion, you may say.
I'd rather say it's a 'positive' negative. People always say look on the bright side first. But now, you have to start at the very bottom of the list- the worst expectation- before ruling out everything bad and climbing your way up.
I suppose we have to throw aside our own negativity first for us to get a grip on positivity.
The same goes if you're a Muslim, means you're a Muslim, until proven otherwise.
And as long as we hold on to what we believe is unmistakably true, nothing will prove it otherwise.
p/s: You and I, until proven otherwise. :)