Noone is good ?

Throw them in a pit of fire. If they come back unscathed, they are good. If they are burned...well, you know.

Ask them😂

By their Intention and smile

don't know

যা দেখছো, তা তো তা না,
সব দেখা জানা না... 😇!

Never possible. To judge a person if he/she is good or bad it's like impossible to me

Through his or her way of talking

We have to spend time.there is no other way.