based on the time chart when you want to check follow below-mentioned rules
if 2nd house cuspal sub-load is sun, strong-moon, Jupiter, venus, benefic-mercury tells about truth.
if it is mars, rahu, ketu, week-moon, malefic-mercury tells about laying.
in case of Saturn half-truth. (he tells 50% truth other 50% kept secret)
some times in case of rahu, ketu being node signs you need to check 2nd house cuspal sub-lord of the sub-lord connections.
Note : you need to practice more than 100 times to get confidence on these rules.