Testing is dependent on context, and testers should make problems easier by clustering defects together and applying lessons from past experience to testing processes and techniques, while avoiding over-reliance on testing.

1. What are the
Fundamental
Principles of
Testing?

2. Testing is context-
dependent

3. Make the problem
easier

4. Defects cluster
together

5. Apply lessons from
experience in process
and techniques

6. Beware of the
pesticide paradox