Basic errors in physics have the foundation of René Descartes' exclusion of the "spirit" from natural descriptions resulting to observer exclusion. As a result observer properties become incorrectly told as target properties e. g.: entropy, which is instead simply a measure of the missing knowledge of the observer.

Better methods of observation and measurement can reduce entropy at most independent of the target. The relation to Shannon-Entropy regarding information transfer becomes much more clear.

Observation produces target influence for quantum systems, what raises again the question about observer exclusion, and further tells that the spirit creates the real.

Comparison as a kind of logical operation stimulates extension of foundation.