Despite the success of Thailand and, to a lesser extent, Pakistan and Vietnam, many people claim that opium replacement is effective, noting that Thailand is the only "real" success, but that its success is due to unique and non-replicable factors.
Despite the success of Thailand and, to a lesser extent, Pakistan and Vietnam, many people deny that opium replacement is actually effective. The first argument is that Thailand is the only real success, but that its success is due to lots of unique and non-replicable factors.