Earlier quoted context omitted.
""Before humans burned the first coal to fire the first steam engine, the planet was warmer than this and had much higher levels of carbon dioxide in the atmosphere.Both went back down." Yes. That's true and it doesn't in any way mean that it is at all safe for humans to jack up co2 levels in such a short period of time. All of the available evidence from the people who discovered those things in the first place sugg…
Quoted post unavailable.
This is patently false. CookVerheggen 2014 - 91% consensus; Farnsworth and Lichter, 2011 - 84% consensus; Anderegg et al, 2010 - 97% consensus; Doran, 2009 - 97% consensus; Bray and von Storch, 2008 - 93.8% consensus; STATS, 2007 - 95% consensus; Oreskes, 2004 - 100% consensus, Lynas et al, 2021 - >99%.
Not only was cook right that there is a consensus, but there is even now a consensus on the consensus and the consensus has grown from 97% to >99%. Cook hasn't been discredited. He's been confirmed over and over by independent groups using completely different methodologies.
This is exactly the same case with Mann. Not only has the hockey stick been confirmed independently countless times other groups have extended the paleo climate reconstruction back over 100,000 years and still come to the same conclusion that current anthropogenic warming is unprecedented. Manns emails were hacked and snippits were taken out of context to paint a misleading picture of his methodologies.
One of his biggest critics physicist Richard Muller (https://youtu.be/8BQpciw8suk here he is criticizing mann) founded an institution called Berkley Earth specifically to investigate Manns findings. He got independent funding and hired the some of the greatest experts in relevant fields including one who received a Nobel while working there. They used the most rigorous statistical methods and were the first group to synthesize every available data set. They found that not only was Mann correct, but that they previous studies had actually underestimated the warming.
""The predictions about future global average temperature anomaly does not involve reproducible experiments, and the models have, thus far, all proven incorrect.""
This is false. The planet is about 1.1C above preindustrial temps. These temps are unprecedented in over 100,000 years. Many studies have predicted that the earth would be this warm at this time with this level of co2. Models are run with multiple emissions scenarios. The way denialsts come to the conclusion you have is to pick a scenario with higher co2 levels than we actually got and claim it overestimated warming. When you pick a scenario that actually reflects the co2 levels we have the predictions are all pretty much in line with what actually has happened.
""As Cook and Mann have shown, it is, and it does""
This opinion has been bought and paid for by fossil fuel companies who paid PR companies to smear these guys. The science stands up very well, but you've bought in and it doesn't matter if 10 or 10,000 studies confirm their findings you will dismiss it as a conspiracy.
""we're using climate change now""
Global warming and climate change are both terms which are in regular usage by climatologists. Global warming is what our greenhouse gas emissions causing. Climate change is a term used to describe the knock on effects of global warming like disruption to the jet stream, increased atmospheric water vapor, droughts, etc. The only time anyone tried to change out the terms global warming for climate change was when PR expert and republican political strategist Frank Luntz used focus groups to discover people showed less concern if climate change was used instead of global warming. After that republicans began insisting that climate change was the correct terminology and this idea spread somewhat in the media and even unwitting democrats. Scientists never insisted we use the term climate change over global warming. It's ironic that a right wing PR campaign is now put forward as evidence of some kind of moving of the goal posts.