Can you explain in short 7 principles of software testing?

Testing shows presence of defects – testing any software will uncover defects in it Early
Testing is essential and will help to detect defect in the initial stage of development.
Exhaustive testing is not possible – It is not possible to check each and every condition and criteria of application.
Testing is context Dependent – Different domains are tested differently, thus testing is purely based on the context of the domain or application.
Defect clustering – 80% of the problems are found in 20% of the modules.
Pesticide paradox – the set of test cases needs to be regularly reviewed and revised.
Absence of Error is fallacy as it will be impossible to imagine software without a defect.