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WingForward | 15 years ago

You haven't seen Mars? Really? It's often visible in the sky at night.

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anon_for_this_1|15 years ago

... says the "astronomy priest" to me :) I have to take your word for it. I know there is what appears to be a star that looks brighter than most others. I, personally, don't have a means at my disposal to know it's mars. I just have to believe you.

gbog|15 years ago

This is not faith. We agree on the name we give to that spot in the sky, which happen to be "Mars". Then we agree to name "planets" the spots that behave in a given manner, "stars" the other spots, etc. That's just how languages are built. "Believing" that the language work "well enough" is necessary for normal life and intellectual exchanges.

To dig deeper, the faith leap is more done when we agree that every night, the spot of light we see at roughly the same place in the sky is the emanation of a unique object, that deserves a unique name. This is related to the identity problem.