No, your statement is not accurate. The concepts of time dilation and length contraction are fundamental principles in the theory of special relativity, which is a well-established scientific theory supported by a vast amount of experimental evidence. Physicists have extensively studied and successfully tested these phenomena in numerous experiments.
Time dilation refers to the effect where time appears to run slower for objects that are moving relative to an observer. This phenomenon has been verified through various experiments, including the famous Hafele-Keating experiment, where atomic clocks were flown on airplanes and compared to stationary clocks.
Length contraction, on the other hand, is the contraction of an object's length in the direction of its motion as observed by a relatively stationary observer. This effect has also been confirmed through experimental measurements, such as particle accelerators, where high-speed particles are observed to contract in length compared to their rest length.
These observations are not observational errors but rather well-established physical phenomena that have been verified by experimental data and are incorporated into the mathematical framework of special relativity. Scientists and physicists have a solid understanding of how to process experimental data within the framework of these concepts and have successfully used them to make predictions and develop technologies like GPS, particle accelerators, and more.
It's important to note that scientific theories and concepts are based on empirical evidence and rigorous testing, and they are subject to revision and refinement as new data and observations arise. However, the current understanding of time dilation and length contraction is well-supported by experimental data and is widely accepted within the scientific community.