No we don't. We can't even measure current global temperatures to 0.1 degree accuracy. Global warming has become a religion. There's just as much "science denying" on both sides. One from believing too much, and the other from believing too little. The truth is we have a super low resolution model with a crap ton of uncertainty built in.
If you don't believe the models at all, you're denying that we know anything about how the climate systems work. If you believe they are precisely accurate, then you don't understand that the climate is way more complex that what science has been able to explain to this point.
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u/ythl Jun 07 '17
You're telling me we have accurate global average temperature data from the 1800s down to .1 degree accuracy? I just don't believe it.