[RightWhale]

Technically speaking, it is precision, not accuracy. There is an indeterminate error somewhere. The error could be in an unsuspected factor in the theory, but it doesn't have to be. The error could be in one or the other lab setup, in the gear, in the treatment of data reduction, or in lax application of rules of statistical error.

[VadeRetro]

Understood. Precision is the repeatability of the experimental setup. Accuracy is its approximation of the true value. With two data points, all you know is that you need more.