You and I don't lie, if you define 'lying' as 'intentionally telling an untruth.' How does it feel, though, when you've said something would happen, and then, it doesn't?
It's just something that happens, right? Time and the unforeseen and all that.
That's hard for me. When I tell a client or a friend 'this or that will happen by such-and-such a time' and then it doesn't, to me, it feels like I lied. Worse, if the failure to deliver is precipitated by someone else's actions, I can find myself unconsciously thinking that they made me lie.
Folks who are fairly self-aware can ponder this, realise it's nonsense, and hope to cope.
What about folks who aren't? What about your client whose project wasn't delivered on time, or the chap in the other department whose reports weren't in hand before his big meeting?
You may be well aware that the circumstances were, truly, beyond your control. Are you positive that's their perception as well? No, what really happened doesn't matter. There is no reality; there is only perception.
When things are beyond your control, that, in and of itself, doesn't change the perceptions others have. If their perception of you used to be 'delivers, and on time' and now it's 'failed to deliver' then you can either choose to flog them with excuses (or reasons) or you can earn back the better perception by owning the failure and jumping through hoops of flaming chainsaws if necessary to right whatever went wrong.