premise: Eight people—Fiona, George, Harriet, Ingrid, Karl, Manuel, Olivia, and Peter—are sitting, evenly spaced, around a circular picnic table. Any two of them are said to be sitting directly across from one another if and only if there are exactly three other people sitting between them, counting in either direction around the table. The following conditions apply: Fiona sits directly across from George. Harriet sits immediately next to neither Fiona nor Karl. Ingrid sits immediately next to, and immediately clockwise from, Olivia. If George does not sit immediately next to Harriet, then which one of the following could be the two people each of whom sits immediately next to Manuel?
hypothesis: Fiona and Harriet