Although I don’t have any real problem with legalizing marijuana, legalizing is not as simple as it sounds. For one thing, we would need to have clear legal definitions around what constitutes intoxication levels. For example, measuring blood alcohol levels is an established practice with clear legal limits. What would be the comparable measure for marijuana? After all, if people are using an hallucinogenic drug, the likelihood of driving an automobile in an impaired condition is quite high. If there is no legal way of measuring this, then how could anybody ever be prosecuted for driving while impaired?