[Know your rights]

Ask yourself, "If there are a half-dozen legal drugs that work, and IF illegal smoked marijuana works 'just as well', is that a good enough reason to legalize marijuana?"

Wrong question ... the correct question in a free country is, "Is there good enough reason to ban marijuana?" With your givens, the answer is no.

A hollow-point to the brain is 100% effective in curing migraines.

False analogy: that negative outweighs the positives in 100% of cases.

[robertpaulsen]

"Is there good enough reason to ban marijuana?"

Double-click the displayed time in the lower right corner of your screen and you'll note that this is 2005, not 1936. Marijuana is illegal.

We must, therefore, ask ourselves the question, "is that a good enough reason to legalize marijuana?"