 however, since that time, a number of different  definitions have emerged , with some contradicting others .Vijayaraghavan, L., Krishnamoorthy, E. S., Brown, R. G., & Trimble, M. R. (2002).
<meaning-changed>  however, since that time, a number of different  definitions have emerged , with some contradicting others .Vijayaraghavan, L., Krishnamoorthy, E. S., Brown, R. G., & Trimble, M. R. (2002).
 however, since that time, a number of different , some contradictory, definitions have emerged , with some contradicting others .Vijayaraghavan, L., Krishnamoorthy, E. S., Brown, R. G., & Trimble, M. R. (2002).