Mimi Ọnụọha’s “Soft Zeros” examines archival failure and unstable knowledge at Vienna’s Secession. The American artist uses the statistical term ‘soft zero’—values registered as absent but unverified—as a framework for understanding erasure within data systems. Central is Ground Truths (2025), a docu-fiction film in which Ọnụọha trains a machine-learning model to locate potential mass graves across Texas—prompted by the Sugar Land 95, remains of Black forced labourers discovered near her childhood home in 2018.