Is Jainism based on logic?

I know many would say know because they believe in Karma and reincarnation. But the spiritual beliefs aside, does it have any form of logic to it?
I meant I know many would say 'no'.

yer, but a bit extreme.

no religion is based on logic or common sense...

Hmm, it seems logical to me.

The idea is to give your entire life to God -- to give up all material possessions, and to go out and seek the ultimate truth, and try to connect to the spirit within you.

It seems logical to me that if you want to connect with the spirit within you and discover the God of the universe, you need to let go of a lot of attachments. Attachments not only to material things, but also to our resentments, our self-criticism, our looks -- everything.

Not everyone is willing to go that far, but I respect those who do.

Conclusion: yes. Logical.

This is a very good question and many who start on their real path to become a JAIN (or JIN) should ask themselves this question. In short, Jainism is based on reality or truth of nature. And as nature is only comprised of logic, so is Jainism. Many know Mahavira as the 24Th Thirthankara (or God if you want to call him) in this time cycle. Yet, if you look/study little further you'll realize that he was the greatest scientist of his time. Whatever he learned or preached, he himself had experimented and gotten results. It is after years and births that he was able to be perfect. There are many examples that show that Jainism is strictly based on logic:
1. Mahavira had said that minute things including air, plants, water, etc. have life. Only till recently has so called current science discovered life in those elements.
2. Jainism says that we were never created nor can we be destroyed (IE. souls are eternal). How can this be true? We all know that soul is another word for energy in the body. Without the soul nothing in the body (including heart, brain, organs, etc.) seems to work. And we have all learned in science that energy can never be created or destroyed.
These are just some of the examples. Unfortunately many times we tend to disbelief things we don't see. But that doesn't mean that they are not true or illogical. For example, we can't see electricity till it is active in form of light. Yet, we still believe it to exist. I agree that nothing should be taken on blind faith. But just because we don't know or understand, that doesn't mean that it is NOT true or doesn't exist. And for you to think a little more, isn't logic also determined by each individual. Something that is logical to us, may not necessarily be logical to someone else. This whole new topic in Jainism called multiplicity of viewpoints. No single view is entirely wrong or right.