Among the 100-odd colleges with academic honor codes, plagiarism-detection services raise a knotty problem: Is software compatible with a system based on trust? The answer frequently devolves to the size and culture of the university. Colleges with traditional student-run honor codes tend to "forefront" trust, emphasizing it above all else. This can be difficult to reconcile with plagiarism-detection software. Other colleges with modified honor codes, jointly administered by faculty and students, may emphasize a system of "relative responsibilities": students are responsible for honesty, and faculty members are obliged to ensure everyone plays fair. In that context, using software as a check may be viewed as both sensible and reasonable. "The Internet has changed everything," says one associate dean, who does not necessarily see a conflict between plagiarism-detection tools and an honor system. If a professor is upfront with students about checking their papers for plagiarism with a software tool, it may not be a presumption of guilt, but trying to let them know they have to be thoughtful about how they are using the Internet. The question currently remains unresolved.