But it is wrong to say you wont do something & then do it or vice versa IYKWIM
I think a promise or a commitment is a commitment and to do different from that knowingly and knowing that you have committed your self to do it and you dont then you have

a, faulsy made a commitment with the intention of not following through (fog me off maybe)

b, Changed ya mind but not informed the person you committed to and given your reason

c, become un trust worthy same as a lie because you have created doubt now by changing you plans

d, no different that a lie as a commitment broken is a lie right? or wrong?

PLEASE DO CORRECT ME if i am wrong just want to get to the bottom of this.