There, where falsehood prevails as truth, truth should not be said. There, again, where truth passes for falsehood, even falsehood should be said.
भवेत् सत्यं न वक्तव्यं वक्तव्यमनृतं भवेत्। यत्रानृतं भवेत् सत्यं सत्यं वाप्यनृतं भवेत्॥