direct_evidence has definitions from the field of law
1
[ noun ] (law) evidence (usually the testimony of a witness) directly related to the fact in dispute

Used in print

(J. F. Vedder, "Micrometeorites", in Francis S. J...)

The direct_evidence on the micrometeorite environment near the Earth is obtained from piezoelectric sensors ( essentially microphones ) and from wire gages ; these instruments are installed on rockets , satellites , and space_probes .

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