The mayor-elect’s turnaround came as he selected Kamar Samuels to lead New York City’s school system at a precarious moment. By Troy Closson In a major shift, Mayor-elect Zohran Mamdani on Wednesday ...

When Hanna Wallach first started testing machine learning models, the tasks were well-defined and easy to evaluate. Did the model correctly identify the cats in an image? Did it accurately predict the ...