Answer: Lincoln's contrast of free labour and slave labour is quite different as he did not base his argument on the fact that free labourers had the conset to work for a wage and slave labourer did not. Explanation: - Rather he argued that the difference was that among the free labourers there was hope to escape from the current condition to a better one whereas slave labourers lacked this kind of hope. - It is not the consent that distinguishes free labour from slave labourers but rather the independence of choice the rise to own productive property and to work for oneself.