A:All of the toothbrushes are black in colour. B:None of the toothbrushes are red in colour. Answer: biological
A:Benjamin is to the right of Roy. Roy is to the right of Bruce. B:Benjamin is to the right of Bruce. Answer: biological
A:Jerry, Kelly and Julie are from Greece, Indonesia and Netherlands respectively. B:Kelly is not from Netherlands. Answer: biological
A:Donald's umbrella is grey in colour. B:Donald does not have an umbrella. Answer: unique
A:Susan tried but wasn't able to leave. B:Susan tried to leave. Answer: biological
A:Does Jane know the solution? No. B:Jane knows the solution. Answer: unique
A:Bob and Nicole are friends. She is a mechanic and he is an engineer. B:Nicole is an engineer. Answer: unique
A:Some of the clips are green in colour. B:None of the clips are green in colour. Answer: unique
A:Is Ken's mother absent-minded. B:Ken has a mother. Answer:
biological