Have you ever had this feeling of 'what I'm gonna say is silly', not because it's really or actually silly but the fact that its the first thought you have after listening to a news or seeing an event happen, then you begin to really think about what to say not to sound 'silly' or in most cases, you keep mute altogether...Yes my thought too.
This happens to most of us when you are in the middle of voicing your opinion and deep down its screaming to surface and you just say 'WHATEVER'!
... I do it a lot, don't know about you. One way i have been able to help such thought is to say it out to myself anyway and then develop it. Its best let out than bottled up.