Being open source is quite measurable: * Is the OS, OS? [Y/n] * Is all software OS? [Y/n] * Is all firmware OS? [Y/n] * Is all hardware OS? [Y/n] You can e

Being open source is quite measurable: * Is the OS, OS? [Y/n] * Is all software OS? [Y/n] * Is all firmware OS? [Y/n] * Is all hardware OS? [Y/n] You can easily count a percentage of open source in your laptop. If your goal is for instance avoid backdoors/surveillance, I would say this is a "very good" laptop, while a COTS laptop would be "bad". As the parent says, good or bad depends on the metric.