Voting machines are black boxes which by nature are incompatible with one fundamental principle of democracy: transparency.<p>This is a major issue because even if the fraud is unproven, voters can legitimately be concerned about the accuracy of how votes are being counted.<p>That said, some statistical analysis research have shown a strong probability of votes being flipped by electronic machines in past elections. Here is the original research paper: <a href="http:&#x2F;&#x2F;madisonvoices.com&#x2F;pdffiles&#x2F;2008_2012_ElectionsResultsAnomaliesAndAnalysis_V1.5.pdf" rel="nofollow">http:&#x2F;&#x2F;madisonvoices.com&#x2F;pdffiles&#x2F;2008_2012_ElectionsResults...</a>