For you next poll on whether people will buy product X:
5 options are recommended
1 - definitely
2 - likely
3 - maybe
4 - unlikely
5 - definitely not
That way you'll get no "don't knows" as responses which makes for a more informative poll result.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix







