They don't stand in the way but they provide a plethora of reasons to prevaricate.
From the guardian.co.uk
But, we'll prevaricate and do nothing until too late, so a few more Libyans will die.
From the scienceblogs.com
Expect others to likewise cancel, defer, prevaricate and change their mind.
From the guardian.co.uk
If any officers disobey or prevaricate, they should be brought to book.
From the economist.com
He loudly opposes torture while his Republican colleagues prevaricate.
From the economist.com
The lawyer is constantly on the phone, advising crisply how to deny, delay and prevaricate.
From the post-gazette.com
Its the taxpayer who is paying the politicians to prevaricate.
From the guardian.co.uk
These countries now have, I prevaricate, much worse problems with corruption as a consequence.
From the guardian.co.uk
Lie, cheat, obfuscate, deny, hide, prevaricate until the second you are completely and utterly penniless.
From the blogs.wsj.com
More examples
Beat around the bush: be deliberately ambiguous or unclear in order to mislead or withhold information
(prevarication) lie: a statement that deviates from or perverts the truth
(prevarication) equivocation: intentionally vague or ambiguous
A lie (also called prevarication, falsehood) is a known untruth expressed as truth.
To deviate, transgress; to go astray (from); To shift or turn from direct speech or behaviour; to evade the truth; to waffle or be (intentionally) ambiguous; To behave in an evasive way such as to delay action; to procrastinate; To collude, as where an informer colludes with the defendant, ...
(prevarication) Deviation from what is right or correct; transgression, perversion; Evasion of the truth; deceit, evasiveness; Evasiveness as a means of playing for time; procrastination, hesitancy