The other day I spent some time in the fabric store comparing fabrics. I didn't know the difference between shantung and dupioni. I had to go in and see and feel the difference. I realized I had a suit listed incorrectly. It was in fact shantung and not dupioni.
I do searches for vintage clothing patterns to study styles.
I rely very heavily on the internet because my budget doesn't allow me to purchase books on the subject but I have spent time in the library doing research. I happen to enjoy doing research and wish I could spend more time doing it.
I also rely on my memory. I was born in the 50's so I do remember alot of the fashions from the 50's to the present.
unless it's fatal it's no big deal...