Lex Machina gives attorneys the ability to examine the metadata around lawsuits in making strategic decisions and predictions, opening doors to quantifying things that were always part of the “unknown factor” in every case. There will always be an unknown factor in every case, but the amount of knowable data we can harness for analysis expands every day. Legal search engines are useful for knowing how the law should operate. Analyzing metadata about courts, judges, etc. can give us a clearer picture of how the law operates in reality, resulting in better predictions and better advice.