Architectural Blueprint
for Ternary Logic Smart Contracts

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract TernaryLogicContract is ReentrancyGuard {
    enum TernaryState { Intent, Hold, Commit, Reject }
    
    struct Decision {
        TernaryState state;
        address initiator;
        bytes32 evidenceHash;
        string reasoning;
        uint256 timestamp;
    }

    mapping(bytes32 => Decision) public decisions;
    address public oracleCustodian;
    uint256 public holdTimeout;

    event HoldInitiated(bytes32 indexed actionId, string reason);
    event HoldResolved(bytes32 indexed actionId, TernaryState finalState, string reasoning);

    modifier onlyOracleCustodian() {
        require(msg.sender == oracleCustodian, "Not authorized");
        _;
    }

    function initiateAction(bytes32 _actionId, string memory _intent) external {
        require(decisions[_actionId].timestamp == 0, "Action already exists");
        decisions[_actionId] = Decision({
            state: TernaryState.Intent,
            initiator: msg.sender,
            evidenceHash: 0,
            reasoning: _intent,
            timestamp: block.timestamp
        });
        // Transition to Hold for initial verification
        _transitionToHold(_actionId, "Initial verification required");
    }

    function _transitionToHold(bytes32 _actionId, string memory _reason) internal {
        decisions[_actionId].state = TernaryState.Hold;
        emit HoldInitiated(_actionId, _reason);
        // In a real implementation, this would trigger an off-chain oracle.
        // For this example, we assume the oracle calls resolveHold later.
    }

    function resolveHold(bytes32 _actionId, uint8 _decision, string memory _reasoning) 
        external onlyOracleCustodian nonReentrant {
        require(decisions[_actionId].state == TernaryState.Hold, "Not in Hold state");
        
        // Checks-Effects-Interactions: Update state first
        if (_decision == 1) {
            decisions[_actionId].state = TernaryState.Commit;
            // Execute main action logic here
        } else {
            decisions[_actionId].state = TernaryState.Reject;
        }
        decisions[_actionId].reasoning = _reasoning;
        
        emit HoldResolved(_actionId, decisions[_actionId].state, _reasoning);
        // Log to Immutable Ledger (simplified)
        // immutableLedgerContract.appendRecord(_actionId, decisions[_actionId]);
    }
}