I've had way too many of these strange encounters to feel surprised anymore. I tried my best to remain sceptical for many years, but one spirit in particular was VERY determined to make sure I knew he/she/it wasn't just in my imagination. Maybe what you see depends on your sensitivity and acceptance that there might be things that have yet to be tackled/proven by science.
I mean, if someone absolutely refuses to believe at all costs that ghosts might exist, even if they see a translucent lady in a bloody gown floating by their bedroom, they're still going to find a way to rationalise it away and believe that explanation, regardless of how ludicrous it might be.
But speaking of ghosts in SG, one of my friends told me that Blk 852 Woodlands Street 83 was haunted. Can't wait for the lockdown to be over so that we can go exploring