The solar-activity cycle existed in its present form during the time period in which the tree rings grew.
The biological mechanisms causing tree growth are unaffected by short-term weather patterns.
Average tree-ring thickness varies from species to species.
Tree-ring thicknesses reflect changes in terrestrial climate.
Both terrestrial climate and the solar-activity cycle randomly affect tree-ring thickness.
The common belief of some linguists that each language is a perfect vehicle for the thoughts of the nation speaking it is in some ways the exact counterpart of the conviction of the Manchester school of economics that supply and demand will regulate everything for the best. Just as economists were blind to the numerous cases in which the law of supply and demand left actual wants unsatisfied, so also many linguists are deaf to those instances in which the very nature of a language calls forth misunderstandings in everyday conversation, and in which, consequently, a word has to be modified or defined in order to present the idea intended by the speaker: He took his stickno, not Johns, but his own. No language is perfect, and if we admit this truth, we must also admit that it is not unreasonable to investigate the relative merits of different languages or of different details in languages.
24. The primary purpose of the passage is to
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