someone else (also named Sam Loomis). On this basis, Tony Williams argues that, while 1980s horror film heroines were more progressive than those of earlier decades, the gender change is done conservatively, and the final-girl convention cannot be regarded as a progressive one "without more thorough investigation." Furthermore, in many slashers, the final girl's victory is often ambiguous or only apparent. The fact that she is still alive at the end of the movie does not make her a victorious heroine. In many of these movies, the end is ambiguous, where the killer/entity is or might be still alive, leaving viewers uncertain about the future of the final girl (a notable example being Jess Bradford in 1974's Black Christmas). The viewers wait for a send-off or sequel bait, and are felt that they are left with an apparent victory. Tony Williams also gives several examples of final girls in the heroines of the Friday the 13th series, such as Chris Higgins from Part III. He notes that she does not conclude the film wholly victorious and is catatonic at the end of the film. Williams also observes that Friday the 13th: The Final Chapter does not have a final girl, despite Trish Jarvis surviving at the end. Additionally, Williams notes that final girls often survive, but in the sequel they are either killed or institutionalized. A notable example is Alice Hardy who survives Friday the 13th (1980) only to be killed in the beginning of Friday the 13th Part 2 (1981). Derek Soles argues that the tragic destiny of such final girls represents an expression of patriarchal society where capable, independent women must either be contained or destroyed. In more recent films, this has started to change, with the final girl no longer being always doomed, a notable example being the Scream series. According to Clover, the final girl in many movies shares common characteristics: she is typically sexually unavailable or virginal, and avoids the vices of the victims like illegal drug use. She sometimes has a unisex name such as Avery, Chris, or Sidney. Occasionally the final girl will have a shared history with the killer. The final girl is the "investigating consciousness" of the film, moving the narrative forward and, as such, she exhibits intelligence, curiosity, and vigilance. Another trope of slashers (particularly in the 1980s) is "death by sex", where sex scenes are shortly followed by violence,