I'm not really how it would be confirmation bias. The NYT doesn't have multiple stories on the same topic with differing conclusions that it A/B tests with. As

I'm not really how it would be confirmation bias. The NYT doesn't have multiple stories on the same topic with differing conclusions that it A/B tests with. As the article states, it'll suggest articles about Hillary Clinton if you've read articles about her previously, but it doesn't say it'll only give you positive ones. There is a chance that it'll narrow people's interests (if you only read sports, for example) but that already happens anyway.