2 sentences

1. 我们还无法确定这个消息的真假。

   wǒ​men hái wú​fǎ què​dìng zhè gè xiāo​xi de zhēn​jiǎ.

   We are still unable to determine whether this news is true or false.

   Source: Dong Chinese Dictionary

2. 为了保险起见，他请专家鉴定这张古钞的真假。

   wèi​le bǎo​xiǎn qǐ​jiàn, tā qǐng zhuān​jiā jiàn​dìng zhè zhāng gǔ​chāo de zhēn​jiǎ.

   To be safe, he asked an expert to authenticate this ancient banknote.

   Source: Dong Chinese Dictionary