The Confusion because more is Known

Today I was caught in a crossfire in an argument about inheritance and composition. In OOPs, world I am relatively new so I learned something new today. As a child, when I used to play video games (Tekken 3) I try to use every action I know which caused me to bite the dust in 4 in 5 games. Same is happening here, more I know the OOPs, more I use it wrongly.

Worth Sharing?