Oh What a Night!

On the importance of sifting good data from bad

One cannot overemphasize the importance of understanding the data – how it was generated, where it came from, how it was manipulated and massaged, and whether the conclusions drawn are supported by the data or if is there overreach.

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Comments (2)

On the importance of sifting good data from bad by Stephen Testa
Stephen - Excellent article and commentary! Indeed, distinguishing good data from bad data is very important, as is distinguishing "true" data from interpretations (or "interpreted data", sometimes referred to as "data"). Thanks for the article!
3/8/2018 9:41:45 AM
On Climate Change by Stephen Testa
Dear Stephen, What a wonderful essay that with humour and grace challenges our approach and ideas about climate change. I am a Seismic Geophysicist by training and no expert in the subject of Climate Change. I am familiar with the challenges reservoir engineers in oil and gas face when trying to model reservoir fluid production behaviour. It is pretty complex maths even for an oil and gas field of say 1-100 sq. km. I have been fascinated in the past looking at the maths of the climate change model like that attached from an MIT website. Here they state that there are 7 (or more) variables to describe climate change and if you look at the last slide, there are 12 physical earth processes that need to be parametrized only one of which is 'emission of pollutants'! How on earth are you going to get a unique solution to a multi parametered equation like this? I thought inverting seismic data was non unique!! This is orders of magnitude greater. And I do have a feeling that small physical changes of any of the earth processes can have huge effects in outcomes. So, adding to your comments on data and the need to have clean/honest data, we need to make clear how non unique the Climate Change modelling outcomes can be. Experts might pick holes in what I say, but I am glad to listen. Thanks again Stephen. With Regards from Melbourne, Balakrishnan Kunjan (Bala) https://ocw.mit.edu/courses/sloan-school-of-management/15-023j-global-climate-change-economics-science-and-policy-spring-2008/lecture-notes/lec3.pdf
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3/7/2018 6:43:46 PM

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