1. RASHI METHOD: REFERENCES BRIEF EXPLANATION: Commentary on a verse is provided thru a cross-reference to another verse. The cross references can either provide (1a) further details, (1b) confirm citations, or (1c) clarify word meaning. This examples applies to Rashis Lv13-43a URL Reference: (c) http://www.Rashiyomi.com/w33n14.htm Brief Summary: LIKE THE APPEARANCE OF SKIN LEPROSY (Lv13-43) refers to the symptoms of skin leprosy mentioned in Lv13-02

Verse Lv13-43a discussing the appearance of certain head leprosies states Then the priest shall look upon it; and, behold, if the swelling of the sore is white reddish in his bald head, or in his bald forehead, as the appearance of skin leprosy Rashi clarifies the underlined word as the appearance of skin leprosy by referencing verse Lv13-02 which states When a man shall have in the skin of his flesh a swelling, a scab, or bright spot, and it is on the skin of his flesh like the disease of leprosy; then he shall be brought to Aaron the priest, or to one of his sons the priests; Hence the Rashi comment: The reference to appearance like skin leprosy in Lv13-43a refers to the skin leprosy symptoms mentioned in the chapter on skin leprosy beginning with Lv13-02.

Text of Target verse Lv13-43a	Text of Reference Verse Lv13-02
Then the priest shall look upon it; and, behold, if the swelling of the sore is white reddish in his bald head, or in his bald forehead, as the appearance of skin leprosy	When a man shall have in the skin of his flesh a swelling, a scab, or bright spot, and it is on the skin of his flesh like the disease of leprosy; then he shall be brought to Aaron the priest, or to one of his sons the priests
Rashi comments: The reference to appearance like skin leprosy in Lv13-43a refers to the skin leprosy symptoms mentioned in the chapter on skin leprosy beginning with Lv13-02.

Advanced Rashi: Rashi can be better appreciated by examining competing references.
• Verse Lv13-02 begins the chapter on skin leprosy
• Verse Lv13-08 begins the chapters on burn leprosy
• Verse Lv13-29 begins the chapter on non-bald-head leprosy
Each of these leprosies - skin, burn, head - has different examination periods and different leprosy signs. Hence the more detailed Rashi comment on verse Lv13-43a: Skin leprosy has a) 4 shades of white and b) a waiting period of 2 weeks before declaring a final status as a definite lepor. By contrast burn leprosy has a 1 week waiting period while b) non-bald-head leprosy does not have 4 shades that initiate the investigation. This alternate approach to Rashi uses the database method and will be revisited in rule #8 below.