Is it professionally advisable to admit that you are not up to the tasks?

[Btaliat]

Many people have argued that freelancers need to be admitting that they don't know how to handle particular tasks. They don't need to tell tbe clients about their competency. The task that they see finding difficult to handle should be referred to their friends instead of them admitting to such that they don't know how to handle the tasks. Others have argued that there is nothing bad in freelancers need to say the truth no matter what really happens afterwards.