For an indirect observation to be good, therefore, both parts of it must be good.

So we make an indirect observation by looking through the window for signs of freezing, such as frost.

And just as indirect observation in general doesn't need linguistic signs, nor does the special case of communication.

This result is the first, albeit indirect, observation of gravitational radiation.

Astrophysicists searching for black holes thus have to rely on indirect observations.

Scientific observations include the possible identification of biosignatures through indirect observation.

Surface diffusion may be studied by a variety of techniques, including both direct and indirect observations.

Empirical research is a way of gaining knowledge by means of direct and indirect observation or experience.

But can you observe it through indirect observation.

He gives little information on himself, however by indirect observation, we can see he has trouble keeping on subject, and is addicted to chocolate.