This is most likely to avoid speculation about a romance blossoming between the two, due to them actually being father and daughter.

Our advice to him was to tell the truth, to stick to what he knew personally and to avoid speculation.

Even so, he urged people to hold stocks as long-term investments and avoid speculation.

To avoid speculation, those who buy land must farm it for five years.

But you're right, we should avoid too much speculation at this point.

To avoid speculation, the site offers a free "death notification service."

The transfer of production quotas from one country to another should be prohibited in order to avoid speculation.

Let us avoid useless and costly speculation about the climate.

This public approach is needed in order to avoid speculation by pharmaceutical companies and other private interests.