 Metallurgists, as all craftsmen and artisans, lacked the methodical intellectual background but they were the pioneers of causal thinking , based on empirical observation and experimentation (Zilsel 2000).
<coherence>  Metallurgists, as all craftsmen and artisans, lacked the methodical intellectual background but they were the pioneers of causal thinking , based on empirical observation and experimentation (Zilsel 2000).
 Metallurgists, as all craftsmen and artisans, lacked the methodical intellectual background . However, they were the pioneers of causal thinking , based on empirical observation and experimentation (Zilsel 2000).