Some people get high eating raw pot others don't seem to. No one seems to be able to explain the commonly held belief that cannabis has to be heated to feel any effects with oral consumption. I would love to hear an honest explanation of why people believe it, that goes beyond "everybody knows that." It was my opinion as well until I was challenged to give raw consumption a try. Like many peoples first time smoking the effects were hard to differentiate the first time and I had to learn to not do it on any kind of a large meal but the results are very pleasant. I am older and consume regularly but not in large amounts. Possible my tolerance isn't as strong as a heavy smokers.
Decarboxylization is discussed in the Master Wu thread, and mixing that information with my own experiences very dry cannabis seems to work best for me. I have eaten it raw in small aspirin size pieces, or just chewed up a few small buds (after removing the stem) but my favorite is to mix a joints worth into a small cup of yogurt (maybe the fat in the yogurt helps) and have it for breakfast. The first effects can often be felt in 10-15 minutes but it usually takes an hour plus for the full ride to kick in.
Eating half of a joint after smoking the first half can be exceptional, as the smoke high levels out the body stone of oral consumption kicks in and the whole experience will be a lot longer than just smoking that much pot.
Just my two cents worth, but don't knock it until youv'e tried it.