**Problem Statement:**
Given the required input arguments, write an efficient algorithm to solve the **Is Palindrome II (allow one deletion)** problem. Implement the required logic as specified by standard definitions for this classic algorithmic challenge.
**Hint / Expected Approach:**
Two-pointer; on mismatch try skip left or skip right
**Edge Cases to Consider:**
- (1) Already palindrome
- (2) Two mismatches (false)
- (3) Odd length single char in middle