[McGruff]

There was no immediate proof, and it was impossible to establish whether the Ukrainians had targeted the same convoy observed by the Guardian.

http://www.theguardian.com/world/2014/aug/15/ukraine-claims-destroyed-russian-military-vehicles-crossed-border

Huh?

[1rudeboy]

The “proof” is the foreign journalists who observed the armored column crossing the border. The “lack of proof” involves whether some were destroyed.