To conceal his identity, the man's voice has been dubbed over .
He had a microphone concealed in his pocket.
But that which frees - the mystery - is concealed and always concealing itself.
In the elegant concealing of her own intellectual and rhetorical artifice she honours by imitation the modesty of her subjects.
The central result from these models is that strategic concealing of (nonfavourable) information does not always work.
