Some rights reserved by sk8geek Here’s a piece – iRobot – that I wrote for Bang! science magazine in the Irish Times. It’s on one of my favourite subjects: robots. Tell me a joke Siri. ‘Two iPhones walk into a bar . . . I forget the rest.” It turns out that Siri, the new virtual digital assistant on the iPhone 4S, has a (bad) sense of humour. Does the…