Therefore all anarchists were Russians. Fallacy of the undistributed middle. In a valid standard-form categorical syllogism, if either term is distributed in the conclusion, then it must be distributed in the premises. No cats are dogs. Therefore no cats are mammals Fallacy of the illicit major.
All reactionaries are critics of the present administration.
Therefore all critics of the present administration are subversive elements. Fallacy of the illicit minor. No standard form categorical syllogism having two negative premises is valid. Some scientists are not magicians. Therefore some magicians are not astrologers.