History Headscratchers / Phineasandferb

** Even married people are known to flirt. Some [[YourCheatingHeart seriously]], and some not so seriously.

* If the goal of Perry's assignments is to "put a stop to Doof's plans", Doof will just come back with another plan, like he always does. Why don't they just order Perry to destroy him?!
** Because they're the good guys. If Perry the Platypus killed someone, I would turn off the TV and curl up in my sock drawer sobbing about how I just saw a cute fuzzy animal brutally slaughter a man in cold blood. Yeah. Leave the destroying things to the bad guys.
*** Is it wrong I laughed at "a cute fuzzy animal brutally slaughter a man in cold blood"?
*** Yes. Yes it is.
** Beside, Doof is a HarmlessVillain who is [[PokeThePoodle not even remotely evil]]. Do we really need to destroy him?
*** But he has "evil" in his company's jingle...
*** He's a NobleDemon.
** And they're nemeses. Perry would lose his livelihood if Doofenshmirtz kicked the bucket.
** Yeah, Perry's job is to keep him in line, not to destroy him.
** AndAnotherThing: They wouldn't be able to destroy Doofenshmirtz, he has JokerImmunity. It's even {{Lampshaded}} by Vanessa in one episode: "He'll be fine. He blows up all the time."
** Perry and Doofenshmirtz are [[FriendlyEnemies Friendly Enemies]]. You get attached to someone after fighting them every day for a couple years. And yes, Perry is too awesome to kill anyone.
** Boring answer: OWCA simply doesn't have the authority for that. His codename is Agent P, not Agent 00P.

* Why doesn't Candace ever try to get Phineas and Ferb killed so she'll never have to deal with them again?
** This troper is very disturbed by that suggestion.
** She's their ''sister''. Just because they don't always get along it doesn't mean that she doesn't love them.
** Beyond this, she is not sufficiently evil to realize this. She is the most evil of the three siblings, right, but she is- glaringly- less evil than Buford.
** Besides, part of the reason Candace is so bent on busting them is to ''keep them from doing things that can get them hurt.'' Granted, how much she actually cares about that tends to vary depending on the episode, but it still seems unlikely that Candace would do a complete 180 from that unless she '''really''' goes off the deep end.
** Is this from the same person who asked why Perry doesn't kill Doofenshmirtz? If so (and even if not), this is a little disturbing.
** Candace may not be a nice person, and how much she cares for her brothers is highly questionable, but there's a big difference in not liking someone / being indifferent to them, and actually wanting them dead. If she ever did that, even her defenders would agree she crossed the MoralEventHorizon.

** Maybe they figured that Candace being In Charge basically meant they'd have one person ready to call the authorities in case of any real troubles. They just didn't have the same ideas of what was a crisis as Candice did.

** If Candace proves the boys capable of one amazing feat (like building a whole western town in a day) it tends to show she wasn't imagining all the other times, including the rollercoaster. Candice gets a belated apology for "all those times" from her Mom in the future in 'Phineas and Ferb's Quantum Boogaloo' when she demonstrates the reality of time travel.

** Maybe people assume Linda knows what's going on. And on the flip side, Linda may think that either A: they've listened to Candice's crazy rumors, or B: they're exaggerating something her sons did. The fact that everyone enjoys the boys' ideas/inventions probably keeps Linda from really getting upset. No complaints, no problems, why worry?

*** If the day the Candices intervened was the Musical day (and it appears it was), and if the trip forward in time to get the bonding device happened before Musical Day, then many paradoxes and problems go away. Musical!Phineas knows about the bonder. Musical!Isabella knows where and when to intervene to prevent the trip at the end.

** Maybe their relationship was an OldFlame thing this whole time? Like, maybe they dated in the past but broke up for whatever reason and had kids with other people but got back together after their spouse/significant other died/divorced/left them.

** Maybe their relationship was a NewOldFlame thing this whole time? Like, maybe they dated in the past but broke up for whatever reason and had kids with other people but got back together after their spouse/significant other died/divorced/left them.

** Maybe their relationship was a NewOldFlame thing this whole time? Like, maybe they dated in the past but broke up for whatever reason and had kids with other people but after their spouse/significant other died/divorced/left them they got back together.

** Maybe their relationship was a NewOldFlame this whole time.

* This has been bothering me ever since I rewatched "Dude, We're Getting the Band Back Together." Linda and Lawrence supposedly had their first kiss at a Love Händel concert but Phineas and Ferb are step-brothers and in the flashback neither Linda nor Lawrence look old enough to have had children. So what gives?

* Why on earth is the rollercoaster considered so dangerous. Before Perry moved it, it wasn't any more dangerous than something you'd find at six flags. So why is everyone always treating it like it's a nuke?

* Aren't Phineas and Ferb a little young to know all those musical references in "Roller Coaster: The Musical."

* Aren't Phineas and Ferb a little young to know all those musical references in "Roller Coaster: The Musical."

** Lazy Day was a choice. ''Thaddeus and Thor'', they were following Candace's orders of not doing their usual thing and it wasn't necessary to build anything until Candace changed her mind. Climbing the mountain with Baljeet, an invention would've helped and complying with him was just being polite.

* In the "Musical Cliptastic Countdown", Phineas and Ferb openly acknowledge that Perry is guest-starring in a clip show. Wouldn't they wonder why their pet got a role on the show?

* The character page as well as various other TV Tropes pages have referred to Phineas and Ferb's building things as an addiction based off of "Bully Bromance Breakup" where Phineas seemingly goes into withdrawal due to Baljeet prohibiting him from building things (Ferb hides it better but was clearly upset on the inside). However, in both "The Best Lazy Day Ever" and "Thaddeus and Thor" they are perfectly fine with not building anything, so what gives?

* When Perry is hit with the Doofenshmirtz's Greatest-Fear-Inator, it has no effect because apparently he's fearless. But we know his greatest fear, his family finding out his secret identity and him being relocated. He even had a nightmare about it. So why didn't the -Inator show that when it was used on him.

* So as a child, Doof was forced to stand up straight as a lawn gnome, and yet, years later, why is his posture still poor?

* Poofenplotz called L.O.V.E.M.U.F.F.I.N. "a silly boys' club" or something, but aren't there a few female members?

* In "Act Your Age" did Phineas and Ferb know Perry was a secret agent? In the movie, they found out but had their memories erased because their knowledge of it meant Perry would have to be relocated. But in this episode, we never see Perry in his "pet" form, yet he still lives with them. I get he is never seen interacting with Phineas and Ferb in this episode, but just wondering.

* In Night of the Living Pharmacists, why didn't they send Dr. D to activate the water spreader? He's the one person who's immune to the infection. RuleOfDrama, yes. But logically speaking, he's the one who should have done it.

* Why did Future!Candace not know who Doofenschmirtz was in "Quantum Boogaloo" if Present!Candace would eventually meet Vanessa and her father and learn their last name?
** In fact, it's even implied that Ferb ends up marrying Vanessa (he definitely ends up dating her as shown in the flash-forward episode "Act Your Age") which would mean Vanessa would become Candace's sister-in-law, which makes it even more confusing.

*** Which is also the same place that Kowalski from The Penguins of Madagascar show gets his clipboard and crayon.

** Everybody on Linda's side is a redhead: herself, Phineas, Candace, and their aunt.az

* Would it be possible that Candace would be so desperate to bust her brothers that she would make a deal with a demon? Sorry been watching too much Gravity Falls again!

* So Candace has a crippling fear of spiders, and yet she's ok with SpiderMan somehow?

*** Which is to say, [[SamAndMax none of your damn business.]]