Ask a Cool Person Where we ask stylish individuals with particular, exacting, or simply exceptional taste to tell us about the things they’re actually buying. Read more here . Photo-Illustration: The Strategist; Photos: Retailers Formerly the domain of preppy grandmothers’ closets and school uniforms, the trusty cardigan is having something of a moment. Everyone from famous people like Martha Stewart and Katie Holmes to stylish content creators like Leandra Medine Cohen and our resident