Unlike writing, spoken language leaves no explicit concrete evidence of its nature or even its existence.

The most explicit evidence that they were, comes from Stetson's letter to her future husband:

However, there is no explicit external evidence for Shakespeare's hand in the play, so the identification continues to be debated.

In this case, the theorist must demonstrate explicit evidence for a controlled demolition.

He gathers the explicit historical evidence for this, including references to these animals being fed grains.

Afterward, present explicit evidence proving that such transactions never occurred.

There is no explicit evidence that proves the existence of a motive to self-verify.

Syria has refused to do so without more explicit evidence of the group's role in the bombing.

Some believe that 1st-century Christians did not practice it, noting the lack of any explicit evidence of paedobaptism.

But still there was no explicit experimental evidence that the W and Z particles, key figures in the theory, did indeed exist.