Plot hole: Despite the plot, Lucy couldn't be fooled by Jimmy and Timmy Hudson. True, they could be fraternal twins but not even Lucy could mistake them for being identical as one's got a higher voice and the other's shorter.
I Love Lucy (1951)
1 plot hole in The Amatuer Hour
Starring: Lucille Ball, Desi Arnaz, Vivian Vance, William Frawley

The Séance - S1-E7
Continuity mistake: After Lucy tells Mr. Merriweather that he's invited to the seance, when it cuts to Lucy unfolding the card table legs, note the couch behind her with one normal seat cushion on the left, but in the next wideshot there's an additional shorter cushion under the normal cushion. The small towel also repositions itself neatly on the couch. (00:11:55)
Lucy Ricardo: How much do you want to bet?
Fred Mertz: Ten dollars.
Ethel Mertz: Well what's the matter with twenty dollars?
Ricky Ricardo: What's the matter with thirty dollars?
Lucy Ricardo: What's the matter with fifty dollars?
Fred Mertz: What was the matter with ten dollars?
Trivia: It was the first to tape before a live audience.





Answer: There is no reason. It's a just a silly plot device, typical of the era. Women characters were often portrayed as making uninformed assumptions or decisions.
raywest ★