Two liars come to you asking for a job.
Liar #1 has worked for you the past 4 years and has done a poor job. He's not even started most of his projects and the one he did start is dreadfully off track. Arguably your company is worse off now that before you hired him. Liar #1 promises to do all he promised 4 years ago and more if you re-hire him.
Liar #2 regales you with different, but no less grandios lies as Liar #1.
Who do you hire?
If you were Liar #1, who do you think *your boss* would hire?