Either the farmer or the mechanic________ illiterate
Either the farmer or the mechanic is illiterate.
Either the farmer or the mechanic is illiterate.
In order to determine whether the farmer or the mechanic is illiterate, you would need more information. Illiteracy refers to the inability to read or write, so you would need to assess their capabilities in those areas.
To determine if they are illiterate, you could ask them directly about their reading and writing skills. Alternatively, you could observe their interactions with written materials or ask for examples of their written work, if applicable.
It's important to note that illiteracy is not a characteristic unique to any specific occupation or profession. People from various backgrounds and professions can be illiterate, so it cannot be assumed solely based on someone's occupation.