Food for thought.
Web of Spider-Man (Vol. 1) #3
Published: c. March, 1985?
Cover Date: June, 1985
“Iron Bars Do Not a Prison Make…”
Writer: Louise Simonson
Artist: Greg LaRocque
Inker: Jim Mooney
Letterer: Phil Felix
Colorist: George Roussos
Food for thought.
Web of Spider-Man (Vol. 1) #3
Published: c. March, 1985?
Cover Date: June, 1985
“Iron Bars Do Not a Prison Make…”
Writer: Louise Simonson
Artist: Greg LaRocque
Inker: Jim Mooney
Letterer: Phil Felix
Colorist: George Roussos
Lifelong fan of Spider-Man. My secret identity is Adam S.
Who’s going to pay for the replacement skylight? Peter Parker, the Spectacular Spider-Man (Vol. 1) #19 Published: c. March, 1978? Cover Date: June, 1978 “Again, the Enforcers!” Writer: Bill Mantlo Artist: Sal Buscema Inker: Mike […]
I like how that random dude in the next booth over gets a comment in. Amazing Spider-Man (Vol. 1) #44 Published: c. November, 1966? Cover Date: January, 1967 “Where Crawls the Lizard!” Writer: Stan Lee […]
A laundry list of worries. Amazing Spider-Man (Vol. 1) #45 Published: c. December, 1966? Cover Date: February, 1967 “Spidey Smashes Out!” Writer: Stan Lee Artist: John Romita Inker: John Romita Letterer: Sam Rosen


I mean, technically, MJ didn’t “figure it out”. She just happened to be looking out her window and saw Spider-Man come out of Peter’s bedroom.
If X in a murder mystery just happens to overhear Y monologuing about how they are the murderer, then X didn’t *solve* the murder – they just stumbled upon the key information.