Can we ever create a truly ethical artificial intelligence?

Artificial intelligence is increasingly being used as an unbiased judge, for matters ranging from insurance to economic efficiency. But can it ever truly be unbiased? When Remy Descartes first wrote the phrase cogito ergo sum –'I think therefore I am'– in the 1600s, he could not have been aware of the philosophical questioning that would erupt with the onset of artificial intelligence (AI) in the 20th and 21st century. Every Google search, every video suggested on YouTube and every Siri recommendation is built on machine learning algorithms designed to learn everything about your online habits, in a bid to offer targeted content that you might like. Even outside of consumer-level decisions, AI and algorithms are increasingly being used to root out hidden meanings in billions of lines of genetic code, in the hope of finding a cure to a disease or building machines that can talk for themselves.