I am reading "Islam without Extremes" by Mustafa Akyol and came across this passage:
"The most famed and authoritative scholar to emerge from this school was Abu Hanifa, the sympathizer of the Postponers school. His thinking was based firmly on the Qur'an and human reason and a little less the "example" of the Prophet...Abu Hanifa relied on his threefold cord of (Qur'an), qiyas, and Ra'i (reason) with occasional use of istihsan, and scarcely any for Hadith."
Abu Hanifa died in 767 and Bukhari was born in 810. Thus Abu Hanifa had no access to the Sahih Bukhari which is an essential part of Sunni jurisprudence. The thousands of hadith rejected by Bukhari as fabrications would seemingly have been in play during the lifetime of Abu Hanifa. Though the modern Hanifi School of thought does still claim 'reason' as a contributing factor, the collections of sahih hadith collections play a significant role. Same is true for the Maliki School which would seemingly rely less on hadith (as seen with the significantly smaller Al-Muwatta) as the custom of Imam Malik (died 795) but in it's modern form appears follow the same formula as the other schools.
Another point that comes to mind is I remember reading that Abu Hanifa believed small, non-intoxicating amounts of certain types of alcohol was permissible, however this opinion does not exist in the Hanifi School of thought. Which brings me back to my question, are the various schools of thought created by the people they are named after or just based off their ideas and practices and solidified later?
I look forward to your opinions and may God forgive me for anything I have written in error.