Many people wrongly assume that if they blow above the legal limit on a Breathalyzer they are as good as convicted of drunk driving, but that is not always the case. In some cases, the results of Breathalyzer tests can be challenged on general scientific grounds, incomplete or misleading implied consent warnings and in others the circumstances of the particular test can be brought into question, raising a reasonable doubt about the drunk driving defendant's guilt. A skilled and knowledgeable drunk driving lawyer can explain what challenges are appropriate in a particular case and possibly even keep the test results out of court entirely.