| This type of size reduction is of dubious value and is only officially used for quassia which is a hard wood. |
| That is why technicians warn the public again and again not to open dubious emails. |
| Initially they may seem excellent to admire but, in reality, some can be of very dubious quality. |
| Between 7 and 14, called the dubious age of discretion, the child is still presumed to be incapable, but the presumption is not conclusive. |
| Artists enjoy seeing themselves as raffish outsiders, people of dubious morality. |
| Most spam is commercial advertising, often for dubious products, get-rich-quick schemes, or quasi-legal services. |
