singleton reinjection (ˈsɪŋg(ə)lt(ə)n rɪɪnˈdʒɛkʃ(ə)n)
Process where all single socks are re-inserted in the laundry basket in the hope that they eventually pair up again. This process is shown to work efficiently if one only owns only one type of socks, preferably black. The efficiency of the process in the general case is disputed, although eventual converge can be proved in reductio.