Question: Idealist notions took a strong hold among physicists of the early 20th century confronted with the paradoxes of quantum physics and the theory of relativity. In The Grammar of Science, Preface to the 2nd Edition, 1900, Karl Pearson wrote, "There are many signs that a sound idealism is surely replacing, as a basis for natural philosophy, the crude materialism of the older physicists." This book influenced Einstein's regard for the importance of the observer in scientific measurements[citation needed]. In 5 of that book, Pearson asserted that "...science is in reality a classification and analysis of the contents of the mind...." Also, "...the field of science is much more consciousness than an external world."
Is there an answer to this question: When did Einstein publish The Grammar of Science?

Answer: unanswerable

Question: The province is home to several historical sites, including the Shalimar Gardens, the Lahore Fort, the Badshahi Mosque, the Rohtas Fort and the ruins of the ancient city of Harrapa. The Anarkali Market and Jahangir's Tomb are prominent in the city of Lahore as is the Lahore Museum, while the ancient city of Taxila in the northwest was once a major centre of Buddhist and Hindu influence. Several important Sikh shrines are in the province, including the birthplace of the first Guru, Guru Nanak. (born at Nankana Sahib). There are a few famous hill stations, including Murree, Bhurban, Patriata and Fort Munro.
Is there an answer to this question: Taxila has become a major centre of what in the modern age?

Answer: unanswerable

Question: An airport is an aerodrome with facilities for flights to take off and land. Airports often have facilities to store and maintain aircraft, and a control tower. An airport consists of a landing area, which comprises an aerially accessible open space including at least one operationally active surface such as a runway for a plane to take off or a helipad, and often includes adjacent utility buildings such as control towers, hangars and terminals. Larger airports may have fixed base operator services, airport aprons, air traffic control centres, passenger facilities such as restaurants and lounges, and emergency services.
Is there an answer to this question: What is the definition of a helipad?

Answer: unanswerable

Question: The earliest recorded account of a circadian process dates from the 4th century B.C.E., when Androsthenes, a ship captain serving under Alexander the Great, described diurnal leaf movements of the tamarind tree. The observation of a circadian or diurnal process in humans is mentioned in Chinese medical texts dated to around the 13th century, including the Noon and Midnight Manual and the Mnemonic Rhyme to Aid in the Selection of Acu-points According to the Diurnal Cycle, the Day of the Month and the Season of the Year.
Is there an answer to this question: What was first recorded in 400 BC?

Answer:
unanswerable