Nthawi zambiri zimachitika kuti zotulukapo zosokoneza poyamba zimakhala zolephera, zomwe sizikukwaniritsa zoyembekeza. Koma poyang'anitsitsa, zotsatira zake zimakhala zamtengo wapatali m'njira ina. Mapangidwe omwe amawakonda kwambiri wasayansi waku Dutch komanso wopambana Mphotho ya Nobel Pek van Andel ndi awa:: "Mukuyang'ana singano mumsipu ndikutuluka ndi mtsikana wokongola wapafamu".