Practical Certainty 2 : The concept of practical certainty involves the determination of a numerically specified low risk or socially acceptable risk which may be used in decision making where absolute certainty is not possible
Heriot-Watt University, School of Life Sciences, Some Terms Used In Toxicology and Chemical Safety, Edinburgh, UK 1992. http://www.who.int/ipcs/publications/methods/harmo nization/en/compilation_nov2001.pdf, (Tox and Chem Sfty - Amer) {85}