"""Create recovery_planner
Generated by Phi-Octopus Eden
2025-11-08 13:27:15.299399
"""

```python
from typing import List

class RecoveryPlanner:

    def __init__(self):
        self.error_states = []

    def log_error(self, state: str) -> None:
        """
        Logs an error state.

        :param state: The current error state.
        """
        if state not in self.error_states:
            self.error_states.append(state)

    def recover_from_error(self, error_state: str) -> bool:
        """
        Attempts to recover from a given error state.

        :param error_state: The error state to be recovered from.
        :return: True if recovery was successful, False otherwise.
        """
        # Example logic for recovering from an error state
        try:
            self.error_states.remove(error_state)
            return True  # Success in recovery
        except ValueError:
            return False  # Recovery failed

    def clear_recovery_log(self) -> None:
        """
        Clears the log of all recorded errors.
        """
        self.error_states.clear()

def example_usage() -> None:
    planner = RecoveryPlanner()
    
    # Simulating errors and their recovery
    print("Initial error state: 'NetworkDown'")
    planner.log_error('NetworkDown')
    if not planner.recover_from_error('NetworkDown'):
        print("Failed to recover from NetworkDown")
    else:
        print("Recovered from NetworkDown")

    print("\nLogging another error state: 'DatabaseCrash'")
    planner.log_error('DatabaseCrash')

    print("\nTrying to recover from the same error, should fail.")
    if not planner.recover_from_error('DatabaseCrash'):
        print("Failed as expected, state still present in log.")
    else:
        print("Recovered unexpectedly, this is an error.")

    print("\nClearing recovery log")
    planner.clear_recovery_log()

example_usage()
```

This code defines a `RecoveryPlanner` class that logs and attempts to recover from specific error states. The example usage demonstrates logging errors and the process of recovery or its failure.