PROBLEM

mind lock
- problem , puzzle , riddle

dilemma
confused
perplexed
puzzled
flumoxxed

Problem-solving strategy
- abstraction
  - generalization
- analogy
  - transferring information
- brainstorming
  - large number of solutions or ideas
- divide and conquer
- hypothesis testing
- lateral thinking
  - parallel thinking
  - oblique strategy
  - parallel thinking
- means end analysis
  - action at each step