[mr_overalls]

I think it actually points to a hole in English - the lack of a short word that expresses a bit of uncertainty regarding one's own statement.

Anyone want to coin a word (or point one out that we're all apparently unfamiliar with)?

[jacquesm]

AFAIUI seems to solve the problem nicely. Not a native speaker and yet I understood it right away.

[interfixus]

TTBOMK, TANST.

[laretluval]

Maybe

[whatswrongwitu]

Covfefe

[erikpukinskis]

Yes sir, dispatching the operative now.