Asking why one time after another assumes that the problem is perfectly linear, with one cause directly related to another. If we keep asking “why?” we'll eventually get back to the root cause. However, real problems are much more complex than this. One cause does not always lead directly to another cause. There are contributing factors and hidden variables that mess up our ingenious chain of causes. If we try to treat every problem as nothing more than the result of a single chain of causes, we'll miss the complexity that exists in the process.

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