Uncertainty and sources of error

It is vital that we know that no instruments create entirely precise measurements. We can't say with absolute certainty that there is only one answer to what we're trying to figure out regardless. The result we get will depend on how we carry out the measurement. If we are for example are trying to measure the width of a glass, our result will depend on which two points of the glass we measure between.

There are also errors with measurement devices. They often have limits to how accurate they can express a result. Sometimes devices can be broken or used incorrectly, giving an inaccurate result.

There are several steps one can take to combat the naturally occurring uncertainty. One can for example take several measurements and see how much or little the results vary. One could also use different devices, especially if they are very unsure about the results they've received. It is important that if you have received varying results or unexpected results, that you try to justify why that may be the case. Remaining critical to your results and measuring devices will often conclude in a better result.