Don't assume.

I was taking a bus down from NP to KAP, which is 1 stop away and saw a person alight as well. Then I was thinking, why didn't the person walk down to KAP if he boarded at NP, or why did he alight there since the buses that are at the stop are all available at the previous few bus stops.

Then I concluded,

"Don't assume why people alight at bus stops."

Sometimes, you don't need to know why people alight at that bus stop.

If you really need to know, ask. But beware.

Sometimes, you don't really want to know the reason after all.