How to go to Gloucester?

A tourist motoring through the Weat Country stopped a local farmer and asked,

'Am I on the right road to Tiverton?'

'Don't know,' said the farmer.

'Well,' said the motorist, ' Can you tell me how to get to Gloucester?'

'No idea, ' said the farmer.

'You don't know anything, do you?' said the tourist.

'I know one thing,' said the farmer. 'I ain't lost like you!'