1.  They may simply do not have the opportunity to make their ideas known or they can't through light upon them.

2.  Even the logic system of some fields may also in common when compared.

3.  The goods may not as good as we expected because we can't examine them before buying.

4.  To this \

5.  The goods may not very good.

6.  We may not so outstanding, so perfect, and have so many skills, but it doesn't matter.

7.  The recommendation may not strong enough to persuade the CEO to make the choice.