Pk70 sahib ji
You are beginning to look like our respected forum member Sinister ji who likes topics like this.
There are 3 answers.
Logical truth -- A is telling half the truth because the only thing one can know by logic alone is that it is either Saturday or Monday because the train runs only on Saturday or Monday.
Personal/psychological truth -- B's personal truth is that it is a nice morning. B is not happy to have his truth modified. He doesn't want to have Saturday added on. But OK he goes along with it, reluctantly.
Then there is His Truth
rwgu rwmklI mhlw 5 ]
rxJuMJnVw gwau sKI hir eyku iDAwvhu ]Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-sikhi-sikhism/21169-sikhism.htmlReference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=21169 siqguru qum syiv sKI min icMidAVw Plu pwvhu ] Raag Ramkali Mohalla V
Runjhunjhunda gavo sakhi Har ek dhyiyavaho.
Satguru tum sev sakhi mun chindiyada phal pavaho.
“O ‘friends, sing the melodious songs praising the Absolute One God. O ’friends, by reflecting upon Satguru (God), the desires will be fulfilled.”
So Person C - maybe Guru Arjan Dev (I think Ang 952) says we only need One Truth to be complete. Gurmukh is dyed in the color of the Truth.
Apologies sahibji, I did not answer your question. But I had a good time with it.