Carole Le Floch lived on the streets for a time after her life fell apart. She was able to rebuild her life, thanks in large part to support groups at her shelter. This experiential knowledge, acquired through painful experience, has enabled her to become an expert in public participation: she organizes and supports the participation of people facing social exclusion in institutions, so that they have a say in public policy. She also advocates for the formal and lasting recognition of their experiential knowledge in the training of social workers. She advocates for solutions such as the establishment of day centers where anyone in a highly vulnerable situation could go to meet a multidisciplinary team of professionals and receive support from them. The ethical principle she champions—“reaching out”—means not waiting for people facing exclusion to request help from professionals in the medical-social sector.