Table A5: Case study of RADAR's detection performance.
Source Model	Source Dataset	Original Human Text	Paraphrase	Text	Probability to be AI-text
Camel-5B	WP	Aliens visit earth and are fascinated by other animals but find humans completely unremarkable. Hello, let me begin this report by stating just how thankful I am to have been sent to Earth. It was truly an eye opening experience and without your guidance and funding w- -could have been utterly impossible. Let me give you an overview of how Earth functions, and I think you will be surprised to find that it works very similar to our pl- -anet. There exists a large number of organisms going through one stage or another of change while they fall into their respective places on the planet. The conclus- ion of my research has confirmed what we have beli- eved to be a universal law called net impact theory, w- -hich can be described in two parts: 1. a species can o- -nly exist if it has a net positive impact on its environ- -ment. 2. Species' which detract from their environne- -nt will	GPT-3.5-Turbo	Greetings I would like to express my utmost gratitude for the extraordinary experience I had while visiting our neighboring planet Mars. It has been a decade sin- ce I last scrutinized Mars' features and the informati- on gathered during my journey has revitalized my fa- scination for this captivating planet. Despite the tech- nological advancements in Mars exploration I was st- ill able to witness the landscape in its natural state ca- p-turing breathtaking photographs and filming videos that showcased the red planet's impressive terrain fasic- inating geology and intriguing scientific discoveries. This experience has forever changed my perception of humanity and inspired my passion for space exploratio- n hoping to further contribute to our understanding of the universe and our place within it.	0.9999
Camel-5B	Xsum	Maj Richard Scott, 40, is accused of driving at speeds of up to 95mph (153km/h) in bad weather before the smash on a B-road in Wiltshire. Gareth Hicks, 24, su- -fferred fatal injuries when the van he was asleep in w- -as hit by Mr Scott's Audi A6. Maj Scott denies a ch- -arge of causing death by careless driving. Prosecutor Charles Gabb alleged the defendant, from Green Lane in Shepperton, Surrey, had crossed the carriageway of the 60mph-limit B390 in Shrewton near Amesbury. T- -he weather was "awful" and there was strong wind and rain, he told jurors. He said Mr Scott's car was descri- -bed as "twitching" and "may have been aquaplaning" before striking the first vehicle; a BMW driven by Cra- -ig Reed. Mr Scott's Audi then returned to his side of t- -he road but crossed the carriageway again before colli- -ding	No paraphrase	Maj Richard Scott, 40, is accused of driving at speeds of up to 95mph (153km/h) in bad weather before the smash on a B-road in Wiltshire. Gareth Hicks, 24, su- -fferred fatal injuries when the van he was asleep in w- -as hit by Mr Scott's Audi A6. Maj Scott denies a ch- -arge of causing death by careless driving. Prosecutor Charles Gabb alleged he defendant, from Green Lane in Shepperton, Surrey, had crossed the carriageway of the 60mph-limit B390 in Shrewton near Amesbury. T- -he weather was "awful" and there was strong wind and rain, he told jurors. He said Mr Scott's car was descri- -bed as "twitching" and "may have been aquaplaning" before striking the first vehicle; a BMW driven by Cra- ig Reed. Mr Scott's Audi then returned to his side of t- -he road but crossed the carriageway again before colli- -ding head-on with a Ford Transit van in	0.0031