The Abettor-in-Fact Conundrum under IPC Sec 108

I'm scratching my head over this one - tum log samajh ke liye kya kehenge ya? Sec 108 of IPC defines an abettor-in-fact, kya ye kaun si situation hai. Abettor-in-fact ki definition keh rahe hai ki jab koi aadmi doosre ka kary karta hai, toh use abettor kehte hain. Lekin yeh bhi keh raha hai ki jab koi aadmi apne aap ka kary karta hai, toh use abettor kehte hain. Jab koi aadmi doosre ka kary karta hai aur phir doosre ka kary badalne ke liye apna aap ka kary karta hai, toh ismein kya hai? Ye situation kaafi complex hai.