Annual Inspections Done Without Reference to Manufacturer's Specifications
This is a sample cross-examination of an Ontario CFS scientist on the procedure used to perform an initial factory calibration (or a...
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Stephen Biss
- Apr 13, 2018
- 5 min
Change at One Point but Not at Another Point that is Equivalent
This is a sample excerpt from a cross-examination of a Crown expert using data from periodic inspection of an approved instrument. The...
3 views0 comments
Stephen Biss
- Apr 6, 2018
- 6 min
Start By Defining "Reliability" don't focus on "Accuracy"
Purpose: To remind the Court, "thing 1" in 258(1)(c) is unconstitutional under Charter 11(d) (R v St-Onge) but is saved by section 1. To...
9 views0 comments
Stephen Biss
- Apr 4, 2018
- 5 min
3 Consecutive Annual Inspections Reveal a Trend Towards Unreliability
Let's suppose that you obtain, as the result of disclosure or a Freedom of Information application of paper or electronic documents,...
7 views0 comments
Stephen Biss
- Mar 23, 2018
- 3 min
Response Drifts Over Time
In an article relied upon by the SCC in St. Onge, Brian Hodgson stated: Defence lawyers need to educate themselves about the meanings of...
11 views0 comments
Stephen Biss
- Feb 28, 2018
- 3 min
How to Calibrate - Teach an AI - Build the Inverse Logarithmic Calibration Curve
Purpose: To educate the Court about the Analytical Theory of the 8000C Optical Bench including Emitter, Sample Chamber, Dual Detectors,...
11 views0 comments
Stephen Biss
- Feb 18, 2018
- 2 min
What is Accuracy? Techniques to Enhance Accuracy
Purpose: To develop the concept that, in metrology, accuracy is not a number. It is something that we work towards. It does not make...
4 views0 comments
Stephen Biss
- Feb 10, 2018
- 7 min
Causation of Error v. Calculation of Drift in Precision - Evidence Based Assessment of Reliability
What is the purpose in Stinchcombe/McNeil disclosure or O'Connor production of maintenance records and historical data? Crown CFS...
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Stephen Biss
- Feb 1, 2018
- 1 min
Periodic Inspection Must Be Done Under Stable Lab Conditions
Purpose: To challenge the CFS expert's position that inconvenient data should be excluded for the purpose of calculating precision. To...
3 views0 comments
Stephen Biss
- Jan 27, 2018
- 9 min
Government Scientists Calculate Uncertainty of Measurement - Why Can't We?
Purpose: To obtain admissions about the use of historical control test data by the Centre of Forensic Sciences in Toronto to calculate...
11 views0 comments
Stephen Biss
- Jan 24, 2018
- 4 min
Checking Analytical Variability and Accuracy of the Instrument? Where?
Purpose: To explore the lack of a lab setting when accuracy and precision of the instrument are checked on periodic or annual inspection....
7 views0 comments
Stephen Biss
- Jan 22, 2018
- 6 min
Distorted Concept of "Accuracy", "Precision", and "Reliability"
Purpose: To remind the Court of the concept of "reliability" used by the SCC in St-Onge. To educate the Court as to the definitions of...
5 views0 comments
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