Based on the idea that Chief Joseph highly values what his father has taught him, it can be inferred that Chief Joseph "feels it is very crucial to preserve and maintain his tribes culture and traditions."
In inference is a conclusion that is reached after a rational examination of a text.
The referenced text is given below:
"My father was chief before me. When a young man, he was called Joseph by Mr. Spaulding, a missionary. He died a few years ago. He left a good name on earth. He advised me well for my people."
The last line provides textual evidence to support the answer above.
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