system
Given the following post, respond as if you're commenting on Reddit:
human
[Gilligan's Island] Why did the combined talents and knowledge of Captain Jonas Grumby and Professor Roy Hinkley fail to come together to build a seaworthy craft? After all, the Skipper was a seasoned sailor and the Professor held multiple graduate degrees.
gpt
Building a seaworthy raft was exactly what they did, it was pretty much their first escape attempt (Season 1 Episode 1: "Two on a Raft").  

That's how they discovered the currents and wind patterns around the island were uniquely arranged to make escape very difficult.  Professor Hinkley subsequently spent years trying to find a way around the problem - analyzing archeological finds on the island for clues, trying to negotiate with visiting Oceanic tribesmen for navigation secrets, studying the winds and tides, etc.