When a courtesan can get money from a man whom she may go to see, and also money from a man whom she may not go to see, this is called a gain on both sides.
(b).

When a courtesan has to incur further expense if she goes to see a man, and yet runs the risk of incurring an irremediable loss if she does not go to see him, this is called a loss on both sides.
(c).

When a courtesan is uncertain, whether a particular man would give her anything on her going to see him, without incurring expense on her part, or whether on her neglecting him another man would give her something, this is called a doubt on both sides about gain.
(d.) When a courtesan is uncertain, whether, on going at her own expense to see an old enemy, he would take back from her what he may have given her, or whether by her not going to see him he would cause some disaster to fall upon her, this is called a doubt on both sides about loss.
By combining the above, the following six kinds of mixed results are produced, viz.: (a).

Gain on one side, and loss on the other.
(b).

Gain on one side, and doubt of gain on the other.
(c).