way off base
Incorrect; mistaken or misinformed; not aligned with reality. An allusion to baseball, in which baserunners are only "safe" if their foot is touching a "base." Hyphenated if used before a noun. Primarily heard in US. Your arguments would be compelling if your entire premise wasn't completely off base. You need to stop making these off-base assumptions about how the process works.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
way off (base)
mod. on the wrong track; completely wrong. (see also off base.) Sorry. You are way off. You should just give up.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.