This is problematic as estimates of rock ages are variable and are subject to laboratory error.

And recently, a World Anti-Doping Agency spokesman said Hamilton had kept his Olympic medal only because of a laboratory error.

Asked what the chances are of laboratory error, Ms. Newall said: "Nonexistent."

Oelsner protested his innocence, claiming that there had been a laboratory error or an act of sabotage involved.

It could even be a laboratory error for all I know.

Maybe Peter was right: his finding of ethylene had resulted from a laboratory error.

It is no laboratory error or false positive.

DNA fingerprint changes in Tuberculosis: reinfection, evolution, or laboratory error?

To exclude a laboratory error, Mr. Mueller's level was measured a second time.

But the Pasteur Institute's report about the laboratory error, a contamination of one strain in its own laboratory that led to its being mislabeled.