In backward-chaining, the goal (initially) is to find evidence for disease D. To achieve this, one would search for all rules whose action-part included a conclusion that the patient had disease D. One would then take each such rule and examine, in turn, the condition part of the rule. To support the disease D hypothesis, one has to show that these conditions are true. Thus these conditions now become the goals of the backward-chaining production system. If the conditions are not supported directly by the contents of working memory, we need to find rules whose action-parts include these conditions as their conclusions. And so on, until either we have established a chain of reasoning demonstrating that the patient has disease D, or until we can find no more rules whose action-parts include conditions that are now among our list of goals.
A coroner has said she cannot be sure a 13-year-old girl who was found hanged after going missing from home intended to die. Amber Peat was found dead three days after walking out of her home in Nottinghamshire in May 2015 following an argument about chores. Assistant Nottinghamshire coroner Laurinda Bower considered whether to return a conclusion of suicide. However, she instead returned a narrative conclusion. "Considering Amber's age, her emotional immaturity and and her undoubted vulnerability, and the absence of any professional ever having properly assessed Amber's risk of self-harm or suicide, I am not able to determine, on the balance of probabilities, Amber's intention at the time of her death," she said.
Authorities found an abandoned truck in Mansfield, Ohio, last weekend that they believe was stolen by fugitive Shawn Richard Christy, 26, The New York Times reported on Tuesday. FILE: Shawn Richard Christy, who authorities say is accused of threatening President Donald Trump, is being sought in Ohio, where he is believed to have abandoned a stolen truck. Christy has been on the run since June 19 after allegedly threatening John M. Morganelli, the district attorney of Northampton County, Pa., and Trump in a Facebook post. "Keep it up Morganelli, I promise I'll put a bullet in your head as soon as I put on ein the head of President Donald J. Trump," Christy allegedly wrote. The Facebook post has since been deleted, Washington's FOX 5 DC reported.