winnow

to winnow truth from falsehood

a breeze winnowing the tall grass.

winnowing out the errors in logic.

the contenders had been winnowed to five.

the autumn wind winnowing its way through the grass.

women winnow the chaff from piles of unhusked rice.

amidst this welter of confusing signals, it's difficult to winnow out the truth.

guidelines that would help winnow out those not fit to be soldiers.

Under the rice huller head winnower is designed for separating husks,unripe paddy and dust from the mixture of unhulled paddy and brown rice.