answer ascertain assure be informed become acquainted with bottom broaden the mind catch on certify cinch clear up clinch crack cram the mind debug decide decipher decode determine discover disentangle dismiss all doubt divine do dope dope out ensure establish explain fathom figure out find find out about find the answer find the solution fix gain knowledge get get at get hold of get right guess guess right have it hear hit hit it hunt down insure interpret invent learn learn about load the mind locate make certain make no doubt make no mistake make out make sure make sure of nail down open the lock pick up information plumb psych psych out puzzle out ravel ravel out reassure rediscover remove all doubt resolve riddle run down run to earth see see that see to it set at rest settle solve sort out strike trace trace down track down tumble undo unearth unlock unravel unriddle unscramble untangle untwist unweave work work out