Just some of the many reasons not to CHANT All Accidents Are Preventable…they most logically are NOT.

The illusion of Impossible made possible - It's illogical!

The illusion of Impossible made possible – It’s illogical!

Many 1000s of years of testing, observation and the scientific method in mathematics (statistics), physics, biology, chemistry and a much more fuzzy study of psychology (about 90 years worth) have demonstrated that perfection is not available to humans.

A few examples:

Things break (statistics, physics & chemistry) so are not perfect:

SOME humans are hypersensitive (biology) to some substances you won’t know until they have had an “accident” by their exposure:

There’s TONS of data on Human error and our lack of perfection:

Even fitting man to machine and their workplaces are often discovered ONLY after an accident:

Just start looking you’ll find it in seconds.

ALL = perfection and there is none available so how can ALL be an option? It’s not…So a statement based on perfection using imperfect things and humans CAN NOT logical conclude using any acceptable scientific and mathematical methods. Imperfection + Imperfection CANNOT = ALL


That being said, there is tons of evidence that we can improve once we have gained knowledge. Improvement is more the possible. It’s likely if we take the lessons

from our past and move forward with more knowledge.

Dan Petersen on Accountability and Counting Accidents


The late Dan Petersen discussing perception surveys (asking questions throughout the organization about safety management) and why counting accidents is illogical when trying to measure the existence of safety.

Even more: