Dan Eastwood: Whyitswrong pic
Your pic-with-no-words is hooey. You show two lines intersecting at an angle, that simply don’t exist in the process of projecting Oppenheimer’s data onto the hockey-stick-with-bone-spur, to test your claim that they barely overlap. Here is what the projection process actually involves, using Oppenheimer’s data for African Homo erectus:
(1) Scale off the end points of Oppenheimer’s trend line for the species by estimation using his non-linear axis scales. (2) find the mean of those extreme values (3) Plot the mean position on the linear-scaled hockey stick graph. (4) See the overlap.
You could have reasonably pointed out that a linear trend line on Oppenheimer’s graph would project as a curve in a linear space so a mid point on his graph would not project as the same as the mid point shown above. Not that a mid point on Oppenheimer’s graph was involved.
Looks to me that with this sketch you are ostentatiously blowing off Johnny Public. OK I get the message.