this is what you and others have posted concering this chart.
"how were temperatures measured accurately 4500 years ago ?"
is he serious, i even posted a web site where he could learn from by looking around. but just one way is ice cores. there are many more.
I've seen similar colourful pictures made to look like graphs. I even tracked down the website of the artists, neither of whom disclose Science based credentials.
lol, we all knnow how that went.
By not including a vertical scale this chart is quite clearly fraudulent.
and yet i proved it correct with history.
Here's a cherry picked from an excellent critique of your "not graph but chart"
pedantics.
should have a scale on both the X and Y axes.
i didn't need x & y, just history and common sense.
the same time impossible to "show evidence showing the figures on that chart to be wrong".
i showed evidence showing those figures correct. if they are wrong you can show evidence as well.
