You can't say it's 99.5% due to global warming alone though. You can say 0.5% occurring by random chance but you can't just ascribe everything to one causal factor. Could be multi-factorial.
I don't have a problem with them saying for example - "We believe that the river changed due to warming over the industrial era"
I don't really have a problem with anything they conclude to be honest, I was just answering another guy's question. Shitty of HN users to give me negative points over it. I feel like I'm on Reddit again.
"Based on satellite image analysis and a signal-to-noise ratio as a metric of glacier retreat, we conclude that this instance of river piracy was due to post-industrial climate change."