Ranjit singh ji,
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/bhagats/27429-kabir-and-guru-nanak-dev-ji.html
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=27429
I wonder if a sikh can claim and be a foolish in the sense that when Guru Nanak Dev Ji, himself answers the Sidh on Kailash that he has not any physical Guru but the shabad only is his Guru and the Baani of Anand Sahib clearly restrains us to recite Kacchi Baani and that kacchi Baani is not authenticated in Sikhism, even then if any Sikh claims, i think he is moorakh and mahaa agiaani and ignorant of guru's updes.
Regards and guru fateh !!