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The development of writing is counted among the many achievements and innovations of pre-Columbian American cultures. Independent from the development of writing in other areas of the world, the Mesoamerican region produced several indigenous writing systems beginning in the 1st millennium BCE. What may be the earliest-known example in the Americas of an extensive text thought to be writing is by the Cascajal Block. The Olmec hieroglyphs tablet has been indirectly dated from ceramic shards found in the same context to approximately 900 BCE, around the time that Olmec occupation of San Lorenzo Tenochtitlan began to wane.

What is presumed to be written upon the Cascajal Block?
Answer: extensive text
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Philosophical empiricists hold no knowledge to be properly inferred or deduced unless it is derived from one's sense-based experience. This view is commonly contrasted with rationalism, which states that knowledge may be derived from reason independently of the senses. For example, John Locke held that some knowledge (e.g. knowledge of God's existence) could be arrived at through intuition and reasoning alone. Similarly Robert Boyle, a prominent advocate of the experimental method, held that we have innate ideas. The main continental rationalists (Descartes, Spinoza, and Leibniz) were also advocates of the empirical "scientific method".

Where were the main European rationalists?
Answer: Descartes, Spinoza, and Leibniz
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Emperor Zhang's (r. 7588 AD) reign came to be viewed by later Eastern Han scholars as the high point of the dynastic house. Subsequent reigns were increasingly marked by eunuch intervention in court politics and their involvement in the violent power struggles of the imperial consort clans. With the aid of the eunuch Zheng Zhong (d. 107 AD), Emperor He (r. 88105 AD) had Empress Dowager Dou (d. 97 AD) put under house arrest and her clan stripped of power. This was in revenge for Dou's purging of the clan of his natural motherConsort Liangand then concealing her identity from him. After Emperor He's death, his wife Empress Deng Sui (d. 121 AD) managed state affairs as the regent empress dowager during a turbulent financial crisis and widespread Qiang rebellion that lasted from 107 to 118 AD.

When did the Qiang rebellion end?
Answer:
118 AD