Foolproof 

Something that a fool can't mess with

Bush proves the constitution isn't foolproof

Foolproof, eh? They'll make a better idiot Remember the first Bush?

Foolproof by Ali Bashir February 1, 2006

foolproof 

Something which Bark's algorithms aren't (check "Barking Up The Wrong Tree")

Bark, bark, barking up the wrong tree,
Thinkin' you can control my family.
But your algorithms ain't foolproof or tight,
It's time to shine the spotlight on your oversight.

foolproof by i eat uranium fuel rods August 6, 2023

fullproof 

how uneducated people spell fool-proof.
despite any arguments for the validity of the word "fullproof" the correct spelling literally means 'even a fool couldn't get this wrong'.
clearly the spelling of the word fool-proof is not fool-proof.

Person 1: "It's a fullproof plan"

Person 2: "you're a fool."

fullproof by EducatedPerson May 18, 2012

foolprone 

Something or someone that is at high risk of foolish actions or ideas being brought upon them and cannot become rid of such actions or ideas, no matter the nature of foolishness; antonym of foolproof.

The foolprone plan that Jake created to talk to Sandy suffered many setbacks, as less-than-intelligent people often interfered with his strategy of approaching her.

foolprone by Jason Klug March 11, 2006

fullproof 

Complete evidence or argument for the truth of a proposition. Not to be confused with "foolproof."

(on Facebook)
John: Your plan to create a seagull army is ridiculous...
Sarah: No it's not! It's fullproof!
John: It's foolproof... and that's fullproof evidence that it's not, bitch.

fullproof by Matt73 July 31, 2012

fullproof 

complete, absolute and total evidence or argument for the truth of a proposition.

I Information which tends to determine or demonstrate the truth of a proposition to full extent.

mathematical calculation that shows proof in absolute terms.

The prosecutor presented fullproof evidence against defendant in the murder case.

The scientific research results provided fullproof evidence to the existence of water in other planets

Professor with his Mathematically precise conception and logically efficient execution showed fullproof solution to the problem

fullproof by quixotic123 November 29, 2010