Claim: But we do have other reliable indicators of temperatures before the late 1800s, and the evidence shows temperatures have been warmer than today for most of the past several thousand years, including warmer-than-present temperatures for most of the human civilization time period

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: For example, diverse geochemical and paleontological proxies indicate that at the maximum of global warmth the atmospheric carbon dioxide values were at 700–900 ppm while other proxies such as pedogenic (soil building) carbonate and marine boron isotopes indicate large changes of carbon dioxide of over 2,000 ppm over periods of time of less than 1 million years.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: At around 41.5 million years ago, stable isotopic analysis of samples from Southern Ocean drilling sites indicated a warming event for 600 thousand years.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Before the Industrial Revolution, naturally occurring amounts of greenhouse gases caused the air near the surface to be warmer by about 33 °C (59 °F) than it would be in their absence.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The current scientific consensus is that: Earth's climate has warmed significantly since the late 1800s.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The Jurassic is thought to have been approximately 10 degrees Celsius warmer along 90 degrees East paleolongitude compared to the present temperature of today's central Eurasia.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In at least some areas, the recent period appears to be warmer than has been the case for a thousand or more years".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The IPCC First Assessment Report in 1990 noted evidence that Holocene climatic optimum around 5,000-6,000 years ago had been warmer than the present (at least in summer) and that in some areas there had been exceptional warmth during "a shorter Medieval Warm Period (which may not have been global)" about AD 950-1250, followed by a cooler period of the Little Ice Age which ended only in the middle to late nineteenth century.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Evidence of past climate change and present climate change comes from a variety of sources.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Evidence for warming accumulated.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Ice core records show that before the Holocene there was global warming after the end of the last ice age and cooling periods, but climate changes became more regional at the start of the Younger Dryas.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Estimating Changes in Global Temperature since the Preindustrial Period".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Preceding this was a warm period centered around A.D. 1000, which was warmer than the late 20th century by approximately 1°C.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Climate has been fairly stable over the Holocene.