countryside', he claimed that the inhabitants at Spirit Cave had 'an advanced knowledge of horticulture'. Solheim's chronological chart suggests that 'incipient agriculture' began at about 20,000 BC in southeast Asia. He also suggests that ceramic technology was invented at 13,000 BC although Spirit Cave does not have ceramics until after 6800 BC. Although Solheim concludes that his reconstruction is 'largely hypothetical', his overstatement of the results of Gorman's excavation has led to inflated claims of Hoabinhian agriculture. These claims have detracted from the significance of Spirit Cave as a site with well-preserved evidence of human subsistence and palaeoenvironmental conditions during the Hoabinhian. Viet (2004), however, focuses on mainly Hoabinhians in Viet Nam. Within his wide range of study of this area, Da But is a site that he has worked at which is dated to about fifth to sixth millennium BC to the end of the third millennium BC. Within this site, Viet observed that the food Hoabinhians mostly focused on are mountainous shellfish, nuts, and fruit. Interesting enough, the site even shows a new shellfish species that they consumed: an as-yet-unnamed species of freshwater clam of Corbicula spp; species are known to live in swampy areas and lakes. The general food sources of Hoabinhians were gathered from the follow environmental conditions: Limestone rock mountains (delivering land snails and some small mammals) Mountain water sources like streams, small rivers, swamps and lakes (providing snails and fish) Valley earthen surfaces (nuts, fruits, fungi, vegetables, wild cereals, and wild mammals) Hoabinhian stone artefact technology An experimental Hoabinhian assemblage was created and analyzed by Marwick (2008), which identified variables and methods that are the most useful in analyzing Hoabinhian assemblages. In particular he advocated for the use of a new method involving the dorsal cortex location of a flake. This method in particular was found to be especially useful in determining reduction intensity and may prove instrumental in answering broader archaeological questions involving subsistence, geographic range, and domestication. Based on Marwick's own research and Shoocongdej's (2000, 2006), behavioral ecological models were applied to examine human behavior through lithic assemblages which found in Tham Lod and Ban Rai rockshelters. In theory, high frequencies of pre-processing should reflect logistical mobility strategy. However, at Tham Lod, a high frequencies of pre-processing (CPM) but a residential mobility strategy (ODM) and a low intensity of occupation (PCM) was observed: We can see an internal conflict between models. A